Develop Bugs

Verizon Note 8...T-Mobile sim - help

Hello all, new here and I just purchased a Note 8 from Verizon. The device is paid off fully and i wish to use my T-Mobile simcard in it but it does not seem to be picking up a signal. I did update the verizon software to the latest version when i had my verizon sim card inserted. Verizon customer service told me i need to reset to factor setting then my t-mobile sim should work but this has not helped.
How can i get my t-mobile sim to work? Any help appreciated as i am new to android phones!
Thanks

Hi there, you must flash the new N950U1 2BQK1 or N950U 2BQK2 stock firmware to have full access of T-MOBILE Network. It's the only way it will work, I have AT&T NOTE 8 working on Verizon network with zero problem.
---------- Post added at 02:35 PM ---------- Previous post was at 02:31 PM ----------
It's a very easy process to flash the 4 US Carriers firmware, I have done it more than 50 times and I'm not a developer.

kdecoteau1 said:
Hi there, you must flash the new N950U1 2BQK1 or N950U 2BQK2 stock firmware to have full access of T-MOBILE Network. It's the only way it will work, I have AT&T NOTE 8 working on Verizon network with zero problem.
---------- Post added at 02:35 PM ---------- Previous post was at 02:31 PM ----------
It's a very easy process to flash the 4 US Carriers firmware, I have done it more than 50 times and I'm not a developer.
Click to expand...
Click to collapse
I would like to know where to get the firmware and with what do you flash it with? Is there a instructions thread or link.
It's been over 5 years since I have tinkered with a Samsung device.

Hi there. You'll need to have your Note 8 Bootloader version on level 2, meaning 2BQK2, 2BQJA or anything with 2 before the last 4 digits.
1) tmobile SIM card in device
2) Odin v3.12.7 make sure extract
3) 2BQK2 firmware extract all files
4) put all 4 set of firmware files in the right manner, bl,ap,cp and csc. Don't used home-csc only CSC.
Odin and firmware https://androidfilehost.com/?fid=673791459329067572 2BQK2
https://androidfilehost.com/?fid=962157660013069130 2BQL5
https://drive.google.com/open?id=1bRz4RQzmloSgsuYmyLu92cktT_f8hIYp
Unlock firmware
1) any carrier SIM card
2) Odin v3.12.5 Prince Comsey or modified Odin, make sure extract
3) 2BQK1 firmware, extract all files.
4) put all 4 set of firmware files in the right manner, bl,ap,cp and csc. Don't used home-csc only CSC
Odin and firmware https://androidfilehost.com/?fid=745849072291691586 2BQK1
https://androidfilehost.com/?fid=817906626617955896 2BQL2
https://drive.google.com/open?id=1Lw79Q5npvMRdME33-ioqy692ClZ36n4U
First instructions is for if you want stock US CARRIER BLOATWARE FIRMWARE, second instructions is if you want SAMSUNG STOCK FIRMWARE. Follow steps and everything will be fine, happy flashing.

So wait, I have a Verizon Note 8 (currently using MetroPCS perfectly), but I wanted a stock Samsung ROM (without the Verizon crap on it), I can just flash the second set of files instead and done with it?

Yes

Can I use a gsm sim card and a verizon sim card at the same time on verizon branded phone? I see you have to flash the firmware above but am wondering if this would help me.

So much misinformation in this thread.
I don't even know where to start:
The OP was asking why his T-Monile SIM wouldn't work. It doesnt matter which firmware you're on, if the Note 8 is unlocked (the Verizon Note 8 IS unlocked), and it has a clean IMEI, and your SIM is already activated, then it will get 4G LTE. I know. I have a Verizon Note 8, and use it on Tmobile. I used it for over 24 hours with my T-Mo SIM but running thr Verizon firmware with no issues. Only reason I flashed T-Mobile firmware was to rid myself of Verizon bloat and to get wifi calling.
As far as bootloader, that has no effect on the SIM card working. The OP would need a v2 bootloader firmware if his current firmwarealso had the v2 bootload. It probably does, so thats a moot point, but the implication was the v2 bootloader was the only one that would make his SIM work.
I hope the OP got it all figured out.

mmdpkaaa said:
Hello all, new here and I just purchased a Note 8 from Verizon. The device is paid off fully and i wish to use my T-Mobile simcard in it but it does not seem to be picking up a signal. I did update the verizon software to the latest version when i had my verizon sim card inserted. Verizon customer service told me i need to reset to factor setting then my t-mobile sim should work but this has not helped.
How can i get my t-mobile sim to work? Any help appreciated as i am new to android phones!
Thanks
Click to expand...
Click to collapse
If you want T-Mobile to work best follow the switching carrier guide to change CSC code to TMB and then flash the Latest T-Mobile Firmware...
https://forum.xda-developers.com/showpost.php?p=74087340&postcount=1
unitop4 said:
Can I use a gsm sim card and a verizon sim card at the same time on verizon branded phone? I see you have to flash the firmware above but am wondering if this would help me.
Click to expand...
Click to collapse
No way to dual SIM US models without trying to modify the SIM tray...and some have damaged trying to...

BlueFox721 said:
If you want T-Mobile to work best follow the switching carrier guide to change CSC code to TMB and then flash the Latest T-Mobile Firmware...
https://forum.xda-developers.com/showpost.php?p=74087340&postcount=1
No way to dual SIM US models without trying to modify the SIM tray...and some have damaged trying to...
Click to expand...
Click to collapse
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.

Mr. Orange 645 said:
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.
Click to expand...
Click to collapse
Another user had SIM issues and flashed back to factory (theirs was unlocked) then changed carriers and SIM worked again...sometimes a clean flash can work...

Hi all. For me I flash all firmware at clean wipe, never any issues. I have an unlock AT&T Note 8 unlock running the latest Verizon firmware with VZW SIM active. I also have a t-mobile S8+ unlock and running the latest U1 firmware and working with Verizon SIM active. I constantly switch my firmware between tmobile, verizon and at&t to see performance and what ever else feature added.

kdecoteau1 said:
Hi all. For me I flash all firmware at clean wipe, never any issues. I have an unlock AT&T Note 8 unlock running the latest Verizon firmware with VZW SIM active. I also have a t-mobile S8+ unlock and running the latest U1 firmware and working with Verizon SIM active. I constantly switch my firmware between tmobile, verizon and at&t to see performance and what ever else feature added.
Click to expand...
Click to collapse
How did you get ATT N8 to work on VZW? I flashed my Tmo to VZW and i could never get speeds above 1mpbs. Even with unlocked firmware it did not get anywhere with VZW. I heard that its because the IMEI is not in VZWs database.

Hi there. My AT&T Note 8 works great on Verizon network, it's running the latest N950U1 Firmware 2BQL2, everything works great. It will work good on T-Mobile too, lately tmobile network giving trouble, sometimes less than 1 mbps on download. Since June 2017 I been having trouble with tmobile network in my area and around, so I switch to Verizon, couldn't bother the crappie service. My location I get 215 mbps on my note 8, IPhone 8 plus 147mbps download. I prefer Tmobile but it's not working good in area anymore.

[/COLOR]
Mr. Orange 645 said:
plus the second SIM wouldn't have an IMEI assigned to it.
And I agree the OPs best bet is to flash thr T-Mobile firmware. But his issue was he wasnt getting a signal at all with his T-Mo SIM. Flashing firmware won't fix that. Source: I have a VZW Note 8 on T-Mo. Used it with the VZW firmware and a T-Mo SIM with no issues.
Click to expand...
Click to collapse
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will doing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.

Pastor X said:
[/COLOR]
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will performing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.
Click to expand...
Click to collapse
Nevermind, I fixed it. I had to perform the carrier switch and flash Tmo's firmware. Running perfectly!

Pastor X said:
[/COLOR]
@Mr. Orange 645
I currently have a Verizon Note 8 with a TMO SIM and I'm getting 4GLTE but a few problems. Most of the incoming calls forward to voicemail and all outgoing calls the data has to drop completely before the call can connect. Will doing the carrier switching updates listed in the link above as well as flashing T-Mobile firmware assist with this problem? The phone is on 2BQK2 currently.
Click to expand...
Click to collapse
Omg exacly whats happening to me? So what steps have you guys followed? Should I switch to T-mobile, or to factory unlocked?
I have Verizon phone, unlocked, and I use T-mobile sim card.
I would appreciate the help
Sent from my SM-N950U using Tapatalk

Verizion note8 with tmobile sim card
This is what happened when I changed carriers from the original verizon note8, on verizon network, with verizon sim and the most recent verizon pie update, to a carriers sim, that is tmobile service. And what happens, I didn't even think was possible... I put the new carriers sim in, truconnect, booted and let the phone register the new sim and network. Checked for update.... the was one, let the phone download and update. And you know how Verizon's boot logo is... it wasn't anymore. Booted the tmobile boot logo and sounds, strange. I'm not super noob and the little bit of knowledge and experience that I do have with roms and updates across carriers usually require physically flashing the rom. Correct me if I'm mistaking. Continuing.... optimizing apps....., huh?! The update flashed the tmobile software, without effecting any personally installed apps. Though the update did remove all the verzion software/bloatware, without permissions, and installed tmobile apps. 2 that are meant for user usage. They are tmobiles device unlock and the tmobile app. Which I might add, do not function, I surmise, because in not on the actual main tmobile network, but a scabbed on. I have never seen or experienced anything of the short. Please tell me if this is normal.? I was a bit upset. I did not give any carrier the permission to delete or install any app on my phone. But maybe things have changed since I dabbled. And If they have, maybe this might help the people that have been using Odin to get tmobile version rom while originally being a verzion phone. I dont think it's normal. Please tell me if this has happened to you.

SM-N975U Att note 10+ service issues

I have a att note 10+ that I sim unlocked it will take a Verizon sim and work 100% but it will not work with straight talk i have no service can't call text and no data every once in awhile a text will get thru but can anyone help me with this I can't root because I can't oem unlock unless there is another way any help would be appreciated

ackaite said:
I have a att note 10+ that I sim unlocked it will take a Verizon sim and work 100% but it will not work with straight talk i have no service can't call text and no data every once in awhile a text will get thru but can anyone help me with this I can't root because I can't oem unlock unless there is another way any help would be appreciated
Click to expand...
Click to collapse
Did you set the APN information correctly?
Also are you using the N975U1 firmware or the standard AT&T firmware?
Are you using the BYOD sim card from straight talk?
What have you done over the phone with Straight Talk as far as troubleshooting? - this one can be important. If the phone isn't working with straight talk only it maybe a configuration (apn setting) or provisioning issue.
Are you sure the device is compatible with the area or region your in?
What provider/tower (Verizon, AT&T, etc.) does straight talk have you going through?
More information on what you have done to setup the phone for straight talk, troubleshooting steps you have taken, what information straight talk may have provided (etc. etc.) will help others be able to help you. Providing little or no details makes it rather hard to offer any help.

The apn won't let me put dun in the type I sim unlocked it with a puk code and got strighttalk byop I tried flashing the U1 firmware to it wouldn't take it so I did a Verizon firmware thinking that might help and same thing with the striaght talk it doesn't wanna work i put a Verizon sim in it and it works just like it did on ATT so I'm confused as to why the straight talk sim won't work they can't figure it out on their end either

I factory reset the phone reset network settings did just about everything I could with the phone besides it being funny about the apn cuz it says apn cannot be changed on this device if you put dun in the apn type i dunno the only thing I notice is when the Verizon sim card is in the phone the network mode is set to global whereas with the striaght talk its LTE/CDMA and it won't let you change it to global

ackaite said:
The apn won't let me put dun in the type I sim unlocked it with a puk code and got strighttalk byop I tried flashing the U1 firmware to it wouldn't take it so I did a Verizon firmware thinking that might help and same thing with the striaght talk it doesn't wanna work i put a Verizon sim in it and it works just like it did on ATT so I'm confused as to why the straight talk sim won't work they can't figure it out on their end either
Click to expand...
Click to collapse
Straight Talk uses different mobile providers to offer service different areas.. They utilize Verizon, AT&T, Sprint and T-Mobile (Sprint and T-Mobile have merged recently, but Sprint towers are still active).
I have seen posts across the internet that indicate you should be using the U1 firmware on the phone.. I would make sure your converting the phone to the U1 firmware properly.
If I recall correctly (this is how I did it previously) when flashing the U1 firmware make sure your doing it without the sim card installed and using the non home_csc file. Factory data reset the phone after you successfully flash the U1 firmware and then insert the sim card after setting the phone back up (so it can apply the new sim/network settings).
I would strongly suggest you do not restore a backup during initial setup when you do this. If you restore a backup it may restore previous network settings/configurations that were for what you had previously.
If flashing U1 firmware doesn't help (and since this this is a Straight Talk specific issue) then it's more then likely on the end of Straight Talk. I would call them and make sure that your sim card is the correct one for the cell towers they have you going through and the phone you have. Using an incompatible sim card (or one that is faulty) can cause issues like this. You can also have them send you another sim card to try.
Also contact them to make sure the service is properly provisioned and activated on your phone. Double check the APN with them, and see if they have an alternative one to try. It is also possible that a service outage maybe (or issue with Straight Talk internally) in your area, so I would call them to make sure that neither are not the case here.
ackaite said:
I factory reset the phone reset network settings did just about everything I could with the phone besides it being funny about the apn cuz it says apn cannot be changed on this device if you put dun in the apn type i dunno the only thing I notice is when the Verizon sim card is in the phone the network mode is set to global whereas with the striaght talk its LTE/CDMA and it won't let you change it to global
Click to expand...
Click to collapse
The Global setting doesn't really matter in this case and your phone will be set to use the towers that Straight Talk has you going through.
The only thing that I can think of that would be a problem with network mode is if your sim card from straight talk is meant for a different provider then the towers they use in your area (i.e. sim card is for AT&T but the provider they have for the area is Sprint).

the straight Talk sim works in other phones no problem a s8 and a older note im thinking att has something in the software to block other apns i dunno i unlocked it with a PUK code and flashed verizon firmware on it thinking i could get passed it but the verizon sim works 100% and the att sim works 100% too but a straighttalk sim card (verizon) towers the phone tries it shows 4g and disappears and then it shows it has service but cant call it just says emergency calls only

ackaite said:
the straight Talk sim works in other phones no problem a s8 and a older note
Click to expand...
Click to collapse
I would not use older phones as a means to say the sim card is good. Besides that's irrelevant to what is going on with the Note 10+
ackaite said:
im thinking att has something in the software to block other apns
Click to expand...
Click to collapse
Then this means one of two things... Either you didn't get the phone unlocked or else you did not convert to another carrier (or the U1 firmware XAA region) correctly.
If your using the unlocked firmware (U1 XAA region) then you should be able to edit the APN. If not then you should be able to create one.
ackaite said:
i dunno i unlocked it with a PUK code and flashed verizon firmware on it thinking i could get passed it but the verizon sim works 100% and the att sim works 100% too but a straighttalk sim card (verizon) towers the phone tries it shows 4g and disappears and then it shows it has service but cant call it just says emergency calls only
Click to expand...
Click to collapse
That sounds like either the sim card isn't good, the phone was not activated/provisioned properly in there systems (call them and double check IMEI and model information), the phone is not compatible with the service they offer in your area (I suggest using the XAA region U1 firmware in this case) or else your phone is not fully unlocked.
I would also suggest google searching or else asking them for any updated or alternative APN's to try. It maybe very likely the one you have is not suitable for the phone/area... It wouldn't be the first time I have had an issue similar to this like this.
I am opt to believe the first 3 are the most likely scenarios since the phone works on Verzion with the sim card per your indication.

Yeah and the only reason I tried the older phone is to see if the sim card is activate with the number and the phone itself pulled the apn from network when I tried to flash to U1 the phone gave me a error but it took the Verizon firmware for the 975U but its still not working do you know of a good link for the firmware your talking about so I can try that

ackaite said:
Yeah and the only reason I tried the older phone is to see if the sim card is activate with the number and the phone itself pulled the apn from network
Click to expand...
Click to collapse
From personal experience I would advise in the future you don't do that. When you activate the phone you should activate the one you are using and definitely do not use an older phone to activate a newer phone. I have had many problems with this in the past as provisioning for an older phone didn't always work for my newer ones..
ackaite said:
when I tried to flash to U1 the phone gave me a error but it took the Verizon firmware for the 975U but its still not working do you know of a good link for the firmware your talking about so I can try that
Click to expand...
Click to collapse
I waited for you to give more information on the issue, but you didn't. So I am sorry, but if you don't provide the details of what is going on it makes helping you very difficult. You didn't say what error you are getting, what the firmware version(s) are of what your trying to flash and what is currently on the phone.
Here's the last piece of help I can offer now.
I can tell you that the following can be found on the forum by searching:
Links and how to obtain the firmware - Multiple threads asking the same question exist here. Also Frija, SamFirm, SamMobile are just a few examples of what can be found referenced here.
Bootloader version(s) - what will happen when you try to downgrade and what will happen (along with a important thing) when you upgrade.
Websites to find firmware - SamMobile and some others have been mentioned.
Patched Odin - In case you need the latest version it has been mentioned here already.
I can also tell you that by using Google and searching for SM-975U1 XAA on Sammobile does in fact work.

Brother give me root file for note 10 plus SM-N975U android 10 version one Ul version 2.5 plz help me

Can someone tell me what version of note 10 ive just brought?

Hi guys just got a new phone supposed to be uk unlocked sim free brand new.but its weird
The service provider sw ver dont look english to me
SPR/XAA/VZW
I have my ee sim card inserted and it works to make calls. But there is a weird notification saying OMADM activation not completed
Also says LTE on the screen something I've never heard of or seen here in england we use 4g volte.so I'm confused also the software for uk phones are BTU/BTU/BTU OR XEU/XEU/XEU
And last the box is weird as it says unlocked by Samsung and has a warming saying reproductive harm I was thinking wtf is this phone.
Also it says Qualcomm on the top on a sticker,we use xenox version england
Ps I brought it from Amazon uk

none of it of sounds like a uk version. more like a us one.

raul6 said:
none of it of sounds like a uk version. more like a us one.
Click to expand...
Click to collapse
Can you go into detail please as I'll need to send it back unless there is a way to change it to a uk phone.and what is omadm error popping up on every reboot

Bump for help please guys

No Samsung or phone experts here?that knows what any of this means?

haircut123 said:
Can you go into detail please as I'll need to send it back unless there is a way to change it to a uk phone.and what is omadm error popping up on every reboot
Click to expand...
Click to collapse
you have us version. it can't be turned into uk one. the error is to the with original us firmware and us network

I think it's a Sprint variant.
Samsung CSC Codes List (All) | Change CSC on Samsung Devices
Today, we'll explain Samsung CSC codes. Besides, we also have a list of CSC codes or region codes with a method to change CSC on Samsung.
www.droidviews.com
Is it new?

Yes from amazon uk
So this phone cant be used here in England then other than making phone calls ?and how do I get uk firmware onto the phone?I'm a noob and not good with computers
Also changing the csc codes to uk what will that change?as we dont even have the snapdragon model in england?so would there even be uk firmware for an American phone?
Google tells me spr means sprint and that's the first code of the 3
Vzw looking on google means Verizon and that's the 3rd code so the phone was originally a Verizon locked phone.thats was unlocked and flashed with sprint fw, because the second csc code says xaa and apparently that means unlocked.
So what does this mean for me a uk user.luke I said in the uk our phones are BTU/BTU/BTU or XEU/XEU/XEU if there uk and unlocked

If you have a active sim, try inserting it.
It should come online.
My unlocked 10+ I just got did, zero issues.
If not I would return it.

blackhawk said:
If you have a active sim, try inserting it.
It should come online.
My unlocked 10+ I just got did, zero issues.
If not I would return it.
Click to expand...
Click to collapse
How can I flash uk xenox firmware onto an American snapdragon phone?.I'm a beginner when it comes to this.as I only buy uk phones as I'm in the uk and it seems complicated flashing stuff this handset is a u version and I want to make it the f version

You cannot flash UK firmware on your US phone.
Just return it to Amazon, claim full refund as the product is not as advertised: no UK unlocked version, not new. Also screenshot in post #8 refers to firmware of a Note 9, not a Note 10 (N960 is Note 9), this makes this phone even more suspicious...

Return it. There's a lot of bs going on with sellers of this phone. This has gotten really bad. Amazon, saw some deceptive advertising there recently for this model and the N20U.
Best to contact the seller on the phone first; no phone contact, don't use. Make sure you are given full specs on their site and it's compatible with your country/provider.
Buy only a new one if possible. Used ones may be running on Android 11, you don't want that!
I was able to find a reliable US vender and got a new umlocked 10+ 256gb/12gb Snapdragon about a week ago for $800. It was as advertised except due to its manufacturing date is running on Q not Pie. It's a keeper.

OnnoJ said:
You cannot flash UK firmware on your US phone.
Just return it to Amazon, claim full refund as the product is not as advertised: no UK unlocked version, not new. Also screenshot in post #8 refers to firmware of a Note 9, not a Note 10 (N960 is Note 9), this makes this phone even more suspicious...
Click to expand...
Click to collapse
Oh sorry it's a note 9 i apologise.so if I cant change it to a uk firmware is the phone useless to use in the uk other than to call people?because my sim card works to make calls
Also OMADM activation not completed message is pissing me off
What does it even mean.i think my phone has sprint firmware on it?how can I change it to normal unlocked firmware so it's nothing to do with sprint I cant stant that OMADM ITS MAKING ME MAD
And Verizon is what I think the phone was originally.
Last thing the phone was sold as brand new sealed but it's not even in the correct box the phone I have is 128gb not 512gb
And it had a sealed sticker saying euro sim only but the phone is American? I think the box is fake ?as it looks nothing like any note 9 box I've ever seen

I'm going to try and flash the phone the phone is currently csc SPR/XAA/VZW boot loader 5 I've just downloaded android 10 also on bootloader 5 ovbisly the XAA VERSION will it work or can I only download and flash SPR FIRMWARE?
as I'm trying to get rid of the MADMEN activation not completed message

Update I tried to flash it but when I pressed start in Odin nothing happened so I guess I'm stuck on spr for life unless I forrgire out how to change the first csc

haircut123 said:
Update I tried to flash it but when I pressed start in Odin nothing happened so I guess I'm stuck on spr for life unless I forrgire out how to change the first csc
Click to expand...
Click to collapse
Check this https://forum.xda-developers.com/t/...and-guide-to-convert-to-usa-unlocked.3927478/

SubwayChamp said:
Check this https://forum.xda-developers.com/t/...and-guide-to-convert-to-usa-unlocked.3927478/
Click to expand...
Click to collapse
Cheers the phone is u1 allready just cant change SPR TO XAA

So it's impossible to flash to unlocked unbranded so it's going back to the scammer that sold it to me on amazon

haircut123 said:
So it's impossible to flash to unlocked unbranded so it's going back to the scammer that sold it to me on amazon
Click to expand...
Click to collapse
It's not impossible but if you are not experienced with better get it back, it doesn't worth the try, you can end by messing up completely.

I've flashed phones many many times before normally when I update the fw via ota and then regret it and need to downgrade back .this phone I just flashed but the start button wouldn't work because I was trying to flash XAA VERSION and not the SPR VERSION .I guess if I was to follow a guide on changing the csc from SPR TO XAA then flashing will work but what the point i wanted a uk brand new factory sealed sim free handset like I paid for
So this pos phone can go back to the scammer on amazon.its a discrace they are making fake seals on the boxes.using fake accessories and lieing saying the phones are uk.the average person would fall for this lies because the phone is unlocked my uk sim will work but you get that OMADM pop up and it's a nightmare.plus I doubt half the functionality will even work.

Question 990U1 firmware with wrong csc after repairs

Hello all. I had the WI-FI toggle issue where the Wi-fi simply would not turn on. All measures were taken and finally a local Samsung authorized repair agent had to replace the motherboard which did fix that issue. But I have the model listed in the thread title but the repair shop flashed the 990U firmware on the phone upon return home. I should have realized a red flag when the repairman asked me which carrier I had because they were having an issue with the firmware taking hold. When I got it home it had firmware from November 2021 and it would not update any further.
Well I took it back and then they actually got the 990U1 part right but this time it had the wrong CSC version on it (Tracfone) XAG when I mentioned that mine was carrier unlocked upon purchase so I would want XAA. The agent said Samsung only provided them with the one they put on it???
Now there are differences between the CSC versions. When the software is released being one I have read. My current carrier is LycaMobile so would not a firmware version of XAA be ideal as that is what was provided when I originally purchased the phone and what I had requested or possibly Tmobile as that is whose towers my current carrier will use. Doesn't it also matter as possible future ESIM support and band support could be different depending on the firmware correct??

SAMMYFANNY15 said:
Hello all. I had the WI-FI toggle issue where the Wi-fi simply would not turn on. All measures were taken and finally a local Samsung authorized repair agent had to replace the motherboard which did fix that issue. But I have the model listed in the thread title but the repair shop flashed the 990U firmware on the phone upon return home. I should have realized a red flag when the repairman asked me which carrier I had because they were having an issue with the firmware taking hold. When I got it home it had firmware from November 2021 and it would not update any further.
Well I took it back and then they actually got the 990U1 part right but this time it had the wrong CSC version on it (Tracfone) XAG when I mentioned that mine was carrier unlocked upon purchase so I would want XAA. The agent said Samsung only provided them with the one they put on it???
Now there are differences between the CSC versions. When the software is released being one I have read. My current carrier is LycaMobile so would not a firmware version of XAA be ideal as that is what was provided when I originally purchased the phone and what I had requested or possibly Tmobile as that is whose towers my current carrier will use. Doesn't it also matter as possible future ESIM support and band support could be different depending on the firmware correct??
Click to expand...
Click to collapse
To change csc samfw is a free tool which allow you to change it for free
I recommend to remove sim card first .
I think s21 should support esim . I have s21 fe G990U2 and it's was locked on t-mobile . I took it to the repair shop they unlock it and after the repair I flash G990U3 on it and now my phone has 2 imei and I can use 2 physical Sims on it .

jahanzaiblohani said:
To change csc samfw is a free tool which allow you to change it for free
I recommend to remove sim card first .
I think s21 should support esim . I have s21 fe G990U2 and it's was locked on t-mobile . I took it to the repair shop they unlock it and after the repair I flash G990U3 on it and now my phone has 2 imei and I can use 2 physical Sims on it .
Click to expand...
Click to collapse
I also have the S21 FE G990U2 (MetroPCS variant). Did the OEM unlock option appear in developer options after you flashed it? I would want to un-brand my FE after I unlock it to (CSC XAA?). I would be using Mint as my carrier (T-Mobile).

No there is no oem unlock option in the developer options. It dose not support esim too . Both physical Sims are working .

Question S21 FE G990U2 single sim to dual sim

Hello . I have s21 fe G990u2 when I flash it G990U3 it is displaying me dual sim option and two imei . Sim one and Sim two imei is same
Video url

Exynos or Snapdragon model ?
I have G990U converted to G990U1/DS. But i don't have dual sim option

dokuzovski said:
Exynos or Snapdragon model ?
I have G990U converted to G990U1/DS. But i don't have dual sim option
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Click to collapse
I have snapdragon model . G990U2 and flashed G990U3

Mine is from Verizon but it is factory unlocked with U1 firmware. I don't know the difference between U1 U2 and U3 version. I wanted dual sim but i do not have with my current firmware

dokuzovski said:
Mine is from Verizon but it is factory unlocked with U1 firmware. I don't know the difference between U1 U2 and U3 version. I wanted dual sim but i do not have with my current firmware
Click to expand...
Click to collapse
Actually my phone is locked on t-mobile and I bought unlocking service and imei repair too the guy who unlock my phone flash 2 imei on my phone . He messaged repair imei1 done and imei 2 done . I was shocked how can he flash 2 imei on single imei device its new to me I'm a senior member here and I know samsung is selling it as a single sim phone for s21 fe . S21 has dual sim option one physical and one esim . When he flashed 2 imei then It's still displaying single imei on it when I check *#06# . I flashed U3 firmware on it to change my csc XAA . When I flash U3 android 13 my phone started displaying 2 imei on the phone and both physical Sims. I orders sim tray to test it is it really working or not I wait 4 days to get the sim tray when I got it I tested both sim cards are working fine

dokuzovski said:
Mine is from Verizon but it is factory unlocked with U1 firmware. I don't know the difference between U1 U2 and U3 version. I wanted dual sim but i do not have with my current firmware
Click to expand...
Click to collapse
That unlock and repair cost me around $175

Thank you for the info. I also get another sim tray for my device but unfortunately it only has one imei even the firmware is marked as G990U1/DS. DS stands for dual sim but it is not working. Maybe my device does not have physical second sim slot

dokuzovski said:
Thank you for the info. I also get another sim tray for my device but unfortunately it only has one imei even the firmware is marked as G990U1/DS. DS stands for dual sim but it is not working. Maybe my device does not have physical second sim slot
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Click to collapse
If you go with repair service then you can use 2 Sim card it like I have 2 s21 fe single and now both are dual sim

jahanzaiblohani said:
If you go with repair service then you can use 2 Sim card it like I have 2 s21 fe single and now both are dual sim
Click to expand...
Click to collapse
How can I do that? I have tried to flash U2 and U3 firmwares but those have different binary and the flashing failed from start. I am still on G990U1/DS

dokuzovski said:
How can I do that? I have tried to flash U2 and U3 firmwares but those have different binary and the flashing failed from start. I am still on G990U1/DS
Click to expand...
Click to collapse
You have G990U1/DS and no dual sim support? On G990U1 you cannot flash U2 or U3 .

jahanzaiblohani said:
You have G990U1/DS and no dual sim support? On G990U1 you cannot flash U2 or U3 .
Click to expand...
Click to collapse
Yes exactly there is no dual sim option. I even ordered dual sim tray but still the phone only recognizes one sim

jahanzaiblohani said:
Actually my phone is locked on t-mobile and I bought unlocking service and imei repair too the guy who unlock my phone flash 2 imei on my phone . He messaged repair imei1 done and imei 2 done . I was shocked how can he flash 2 imei on single imei device its new to me I'm a senior member here and I know samsung is selling it as a single sim phone for s21 fe . S21 has dual sim option one physical and one esim . When he flashed 2 imei then It's still displaying single imei on it when I check *#06# . I flashed U3 firmware on it to change my csc XAA . When I flash U3 android 13 my phone started displaying 2 imei on the phone and both physical Sims. I orders sim tray to test it is it really working or not I wait 4 days to get the sim tray when I got it I tested both sim cards are working fine
Click to expand...
Click to collapse
Can you refer me? I have one S21FE locked to US CELLULAR, I'm trying to get it unlocked. Dual Sim function will be nice as well

jahanzaiblohani said:
Actually my phone is locked on t-mobile and I bought unlocking service and imei repair too the guy who unlock my phone flash 2 imei on my phone . He messaged repair imei1 done and imei 2 done . I was shocked how can he flash 2 imei on single imei device its new to me I'm a senior member here and I know samsung is selling it as a single sim phone for s21 fe . S21 has dual sim option one physical and one esim . When he flashed 2 imei then It's still displaying single imei on it when I check *#06# . I flashed U3 firmware on it to change my csc XAA . When I flash U3 android 13 my phone started displaying 2 imei on the phone and both physical Sims. I orders sim tray to test it is it really working or not I wait 4 days to get the sim tray when I got it I tested both sim cards are working fine
Click to expand...
Click to collapse
Could you refer me too? I'm trying to unlock my s21 fe from metro. Thanks.

You need a cpid service which is quite expensive. Like $200 can do carrier unlock and dual sim functionality too