Develop Bugs

Switching from ATT to TMobile, questions inside

Hello, I'm currently using a Galaxy s9+ on ATT and plan on switching to Tmobile this week. Besides unlocking the phone do I have to do anything else for the phone to take advantage of TMobile? Do I have to flash TMobile firmware or anything like that in order for the phone to work properly and if so how, I've been out of the flashing game for a LONG time .

No you don't have to flash t mobile rom as I know when you put a new sim the phone reboots and sets the phone up for that carrier that's what it does on my s9 but mine the unlocked one so I got wifi calling with t mobile sim card in my phone

T mobile
The screen shots should show up

same boat but need to flash TMB image
okay hear's the deal, i am in the same boat moved to T-Mobile few days back and i have a Vzw branded S9+. i was of the opinion that things would workout great, but my area has poor t-Mobile network and i have been unsuccessfully attempted to flash TMB firmware on this phone. I have tried just about all combinations, and every-time the flash is done it boots back as a brand new Vzw phone and looks for a Vzw sim. I insert the TMB SIM and things work but not WIFI calling. Any leads?

riyengarxda said:
okay hear's the deal, i am in the same boat moved to T-Mobile few days back and i have a Vzw branded S9+. i was of the opinion that things would workout great, but my area has poor t-Mobile network and i have been unsuccessfully attempted to flash TMB firmware on this phone. I have tried just about all combinations, and every-time the flash is done it boots back as a brand new Vzw phone and looks for a Vzw sim. I insert the TMB SIM and things work but not WIFI calling. Any leads?
Click to expand...
Click to collapse
What odin you use??

1.13.1 patched.
---------- Post added at 02:54 AM ---------- Previous post was at 02:51 AM ----------
Some more details if that helps..
Paid $24 to Sammobil, went through the flashing process and nothing changed. Did this almost 5 times but seems VZW keeps haunting me. Am I doing something wrong? I downloaded the latest firmware RB8 from Aug 2018 for TMB via sammobile flashed the 4 files AP, BT,CP and CSC. Everything went perfect but when it boots back Damn the same old VZW and the OS says u have a non vzw sim. I even flashed the userdata with the other four and separately but no luck. Do we have any success stories and how we dis this correctly? Using Odin 1.13.3 patched version. Tried to downgrade but that failed.

Use 3.13 I believe

Rally517 said:
Use 3.13 I believe
Click to expand...
Click to collapse
Yes sorry typo error, 3.13.1_3B

Not trying to start a new thread with something similar so I'm just gonna post underneath this one. I have an AT&T S9 that is sim unlocked and all but, for the life of me I can't get it to work on Verizon. I've tried changing the bands in the *#*#3696#*#* menu and all I get is, is data. I tried flashing ARG7 unlocked I believe and it still booted with all the AT&T stuff loaded. The build number now shows ARG7 instead of ARG8. I don't know if there's a specific odin / firmware I need to flash in order to be able to get it right. I've been hunting for hours and flashing and I'm at a loss. Thank you guys in advance.

riyengarxda said:
okay hear's the deal, i am in the same boat moved to T-Mobile few days back and i have a Vzw branded S9+. i was of the opinion that things would workout great, but my area has poor t-Mobile network and i have been unsuccessfully attempted to flash TMB firmware on this phone. I have tried just about all combinations, and every-time the flash is done it boots back as a brand new Vzw phone and looks for a Vzw sim. I insert the TMB SIM and things work but not WIFI calling. Any leads?
Click to expand...
Click to collapse
All the carrier stuff is located in the CSC from the flash.
Side note: from what I've read, Verizon locks down the bands and whatnots that stop TMobile stuff from functioning, like WiFi calling.
I've seen people get it working but not the video calls.

thegreatkazoo said:
All the carrier stuff is located in the CSC from the flash.
Side note: from what I've read, Verizon locks down the bands and whatnots that stop TMobile stuff from functioning, like WiFi calling.
I've seen people get it working but not the video calls.
Click to expand...
Click to collapse
Thanks, I really don't care about video calls but WIFI calling is a real need.. any leads?

thegreatkazoo said:
All the carrier stuff is located in the CSC from the flash.
Side note: from what I've read, Verizon locks down the bands and whatnots that stop TMobile stuff from functioning, like WiFi calling.
I've seen people get it working but not the video calls.
Click to expand...
Click to collapse
All my functions work. Video calling etc etc. Unlocked s9. First I az on Boost mobile. Switched to metro. Flashed tmb everything works.

riyengarxda said:
Thanks, I really don't care about video calls but WIFI calling is a real need.. any leads?
Click to expand...
Click to collapse
There a thread around here that talks about how to get the TMobile services but WiFi calling is all they could get to work. You have to flash the CSC (home partition) from TMobile is what I've heard. I've also heard, you can put in a TMobile Sim and it'll just work. But, I think that might be limited to "factory unlocked" phones.

thegreatkazoo said:
There a thread around here that talks about how to get the TMobile services but WiFi calling is all they could get to work. You have to flash the CSC (home partition) from TMobile is what I've heard. I've also heard, you can put in a TMobile Sim and it'll just work. But, I think that might be limited to "factory unlocked" phones.
Click to expand...
Click to collapse
Do you have the thread link? I tried just about as many I could read up..

riyengarxda said:
Do you have the thread link? I tried just about as many I could read up..
Click to expand...
Click to collapse
I'm at work but I'll be off in a bit and I'll hunt it down once I get home.
If I'm not mistaking, it's the one that talks about flashing the u fw to the u1.

riyengarxda said:
Do you have the thread link? I tried just about as many I could read up..
Click to expand...
Click to collapse
https://forum.xda-developers.com/ga...n8-s8x-s9x-oreo-usa-t-mobile-efs-csc-t3772385
Here you go. There's a version 3 on OP web site. Look up my posts there.

Docmjldds said:
https://forum.xda-developers.com/ga...n8-s8x-s9x-oreo-usa-t-mobile-efs-csc-t3772385
Here you go. There's a version 3 on OP web site. Look up my posts there.
Click to expand...
Click to collapse
Read through all the 16 page thread and found very useful comments from you on usage of V3 detonator and Csc changer. I stand confused over just 2 questions;
1. Do I have to root my s9+ which is from vzw
2. It talks about F and FD variant while I have a u variant running snapdragon.
Show me some light .:angel:

riyengarxda said:
Read through all the 16 page thread and found very useful comments from you on usage of V3 detonator and Csc changer. I stand confused over just 2 questions;
1. Do I have to root my s9+ which is from vzw
2. It talks about F and FD variant while I have a u variant running snapdragon.
Show me some light .:angel:
Click to expand...
Click to collapse
I'm on Exynos S9 and rooted. Doubt this will work on a Snapdragon device. Sorry

Docmjldds said:
I'm on Exynos S9 and rooted. Doubt this will work on a Snapdragon device. Sorry
Click to expand...
Click to collapse
Yup exactly my taught... thank you for all the insights..

Last Resort Regarding Carrier Switching

I'd like to start off by apologizing if there's a thread that has answered this. I've spent nearly a week trying to find my answer because, I'm one of those that doesn't like duplicate post to begin with or those who don't google however, I can't find my definite answer and I just want to reassure before going and spending money.
Scenario: I recently have been given an AT&T Galaxy S9 and I'm mad in love with it (using an iPhone X at the moment lol) and I need it to work on Verizon. Of course my first step will be unlocking the device to be able to be used on different networks and I do by putting in the code that I received and it does unlock it. I proceed to put my sim card in it and I notice I can't seem to get service to work. I noticed giving my Note 8 Verizon to my friend who has AT&T, he could put his sim card in and it'll restart with all AT&T functions including the boot logo and all. My S9 AT&T rejects it still. I did try and tinker with the dial codes (*#*#4636#*#*) and setting my bands to LTE/CDMA. Doing this allowed me to receive 4G LTE on the device but, no cellular service. With that being said, I've read on threads that firmwares from certain manufacturers disable bands so I assume AT&T has those disabled that work for Verizon. My next step was trying to get a verizon firmware to work on it. I downloaded the ARG8 U firmware from verizon for it and it still boots AT&T firmware regardless. My last thought would be waiting for the updated V3 U1 Firmware for the S9 and maybe that'll fix it? I just need some opinions on this matter because, if I can't get this to work then I'm going to proceed on buying a new one unlocked.
Thank you guys in advanced and again, if there's already answers for this then I apologize. I've worked with android since the HTC Hero days and I still get stumped on some things haha.

megaghostgamer said:
Thank you guys in advanced and again, if there's already answers for this then I apologize. I've worked with android since the HTC Hero days and I still get stumped on some things haha.
Click to expand...
Click to collapse
Yes.. wait till XAA-U1 is available or an ATT firmware with userdata file inside which has all ATT related files.

nimms said:
Yes.. wait till XAA-U1 is available or an ATT firmware with userdata file inside which has all ATT related files.
Click to expand...
Click to collapse
When you say ATT firmware do you mean Verizon? I'm trying to convert from ATT to Verizon which I've tried a firmware with Verizon's userdata inside and all it did was double my bloatware lol. Had ATT and Verizon BS. As far as the XAA-U1, I understand then.

megaghostgamer said:
When you say ATT firmware do you mean Verizon? I'm trying to convert from ATT to Verizon which I've tried a firmware with Verizon's userdata inside and all it did was double my bloatware lol. Had ATT and Verizon BS. As far as the XAA-U1, I understand then.
Click to expand...
Click to collapse
Yeah, I misread..
try VZW version
https://updato.com/firmware-archive-select-model?record=12EDD7F878D311E89F15FA163EE8F90B
Or VZW U1
https://updato.com/firmware-archive-select-model?record=E2DA06D078D411E89F15FA163EE8F90B
For proper functionality, make sure there's a "userdata" file when you unzip.
Also, use CSC file which wipes the phone, not home csc file which keeps data intact.
If things don't work.. keep sim inside and do a factory reset with sim. it'll ensure proper CSC selection.

nimms said:
Yeah, I misread..
try VZW version
https://updato.com/firmware-archive-select-model?record=12EDD7F878D311E89F15FA163EE8F90B
Or VZW U1
https://updato.com/firmware-archive-select-model?record=E2DA06D078D411E89F15FA163EE8F90B
For proper functionality, make sure there's a "userdata" file when you unzip.
Also, use CSC file which wipes the phone, not home csc file which keeps data intact.
If things don't work.. keep sim inside and do a factory reset with sim. it'll ensure proper CSC selection.
Click to expand...
Click to collapse
See the issue is those links you posted are meant for the V2 bootloader. G960UOYN(2)ARF4 . I've actually tried the U1 and all from V2 but, it gives back that binary fail due to me being on the V3 bootloader. I'll try with the V3 bootloader files for verizon again and do the whole factor reset afterwards. Unfortunately there hasn't been a V3 U1 yet for the S9. Thank you for helping me figure this out, i'll post my results shortly.

nimms said:
Yeah, I misread..
try VZW version
https://updato.com/firmware-archive-select-model?record=12EDD7F878D311E89F15FA163EE8F90B
Or VZW U1
https://updato.com/firmware-archive-select-model?record=E2DA06D078D411E89F15FA163EE8F90B
For proper functionality, make sure there's a "userdata" file when you unzip.
Also, use CSC file which wipes the phone, not home csc file which keeps data intact.
If things don't work.. keep sim inside and do a factory reset with sim. it'll ensure proper CSC selection.
Click to expand...
Click to collapse
Updating from earlier, I tried with the Verizon U3ARG8 file and all it did was add on the bloatware from verizon. I've tried factory resetting and all and it still doesn't want to swap over. Every time it boots, it begins with the AT&T boot logo and proceeds to not give me proper service. I can mess with the LTE bands and get data working, just not service itself.

megaghostgamer said:
Updating from earlier, I tried with the Verizon U3ARG8 file and all it did was add on the bloatware from verizon. I've tried factory resetting and all and it still doesn't want to swap over. Every time it boots, it begins with the AT&T boot logo and proceeds to not give me proper service. I can mess with the LTE bands and get data working, just not service itself.
Click to expand...
Click to collapse
In S8, there's a method using Combination rom (factory binary) to do a proper carrier switch. Take a look and try. Not sure if that would work, but that's an option.

nimms said:
In S8, there's a method using Combination rom (factory binary) to do a proper carrier switch. Take a look and try. Not sure if that would work, but that's an option.
Click to expand...
Click to collapse
Just tried it, once you get in the factory binary, you're supposed to type *#243203855# in the dialer and be able to switch it there however, it's not allowing me to do so. All it does is clear what I've typed.

megaghostgamer said:
Just tried it, once you get in the factory binary, you're supposed to type *#243203855# in the dialer and be able to switch it there however, it's not allowing me to do so. All it does is clear what I've typed.
Click to expand...
Click to collapse
S8 needs flashing canadian CSC before flashing factory binary. Did you try that too?

nimms said:
S8 needs flashing canadian CSC before flashing factory binary. Did you try that too?
Click to expand...
Click to collapse
The Canadian csc is XAC right? Just trying to hunt for one. I don’t see any for the G960U. I see XAS (unknown) but, I don’t believe it’s the same thing.

megaghostgamer said:
The Canadian csc is XAC right? Just trying to hunt for one. I don’t see any for the G960U. I see XAS (unknown) but, I don’t believe it’s the same thing.
Click to expand...
Click to collapse
You must look for G960W files for Canadian csc

nimms said:
You must look for G960W files for Canadian csc
Click to expand...
Click to collapse
Got it, however, since it's the Canada one, it only allows me to change the CSC to companies from Canada. It doesn't allow me to type the code in factory binary but, it does in stock rom with the XAC CSC flashed. I tried the adb shell where you use the echo function but, I get the common problem others do "/system/bin/sh: can't create /efs/imei/mps_code.dat: Permission denied".
Seems though we are getting closer and closer, never seen something so stubborn haha. Sucks there isn't a U3 XAA yet.

megaghostgamer said:
Got it, however, since it's the Canada one, it only allows me to change the CSC to companies from Canada. It doesn't allow me to type the code in factory binary but, it does in stock rom with the XAC CSC flashed. I tried the adb shell where you use the echo function but, I get the common problem others do "/system/bin/sh: can't create /efs/imei/mps_code.dat: Permission denied".
Seems though we are getting closer and closer, never seen something so stubborn haha. Sucks there isn't a U3 XAA yet.
Click to expand...
Click to collapse
Flashing process
Factory binary,
Do reboot to bootloader via ADB,
Flash Canada "Home CSC" (not plain CSC)
Dial *#243203855# via IME button
Choose XAC, let it restart,
On adb shell, Type in
echo "VZW" > /efs/imei/mps_code.dat
(Make sure to include quotes on VZW)
If that's what you did, i think we are done here (Can't think of any other options)
Source : https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817

nimms said:
Flashing process
Factory binary,
Do reboot to bootloader via ADB,
Flash Canada "Home CSC" (not plain CSC)
Dial *#243203855# via IME button
Choose XAC, let it restart,
On adb shell, Type in
echo "VZW" > /efs/imei/mps_code.dat
(Make sure to include quotes on VZW)
If that's what you did, i think we are done here (Can't think of any other options)
Source : https://forum.xda-developers.com/galaxy-s8/how-to/snap-guide-flashing-standard-fw-carrier-t3625817
Click to expand...
Click to collapse
Meant to reply back but, after flashing the hell out of the phone, it somehow went into XAA CSC and I factory reset it and afterwards it allowed me to connect to Verizon. Thank you so much!

Hi,
Im also trying to convert a VZM S9 to a Canadian CSC. Do the above steps work? because after i flash the factory bin, boot into it, when i try to flash the home_csc from the canadian fw, it always fails, no matter which odin i try. also that IME code, is it only supposed to work once the canadian home_csc as been flashed? because if i try that code in the IME section of the factory bin, i get nothing!

Reapply factory unlock

Hello all, I purchase a Galaxy Note 9 (SM-N960U) in May. It was originally a Sprint phone. I bought it factory unlocked, no carrier or bloatware, unrooted. It just had the ordinary Samsung apps. I have been using the phone with Cricket ever since and have not had any problems whatsoever. Yesterday, one of my friend's phone wasn't working and he had so calls to make. I figured since my phone was unlocked, he should be able to just pop his AT&T sim card in and use my phone to make his calls. When I put it in my phone, the phone had to be restarted because of new sim card being put in. When I did that, my phone was flashed with AT&T stuff, bloatware, bootup logo and all that other crap. After my friend got done using it, I put my sim card back in and restarted it and the AT&T crap remained. Not only that but when I try to use the mobile hotspot, my phone tells me I must have an eligible AT&T data plan to use it. IM ON CRICKET, WHAT THE HECK?! Anyways, does anybody know how I get my phone back to being factory unlocked like it was before? I have checked some of the threads on here and was very confused as to what I should follow. Any good help will be awesome, thanks! My phone is currently on build N960USQU1CSAA if that helps.

get the frija download tool or samfirm and download that firmware set then flash it in Odin with the home_CSC file. That will make it to where you can uninstall the system apps that got installed. Just be sure to get the U1 firmware. You might need to use the modified Odin as the phone might think its carrier locked again.

youdoofus said:
get the frija download tool or samfirm and download that firmware set then flash it in Odin with the home_CSC file. That will make it to where you can uninstall the system apps that got installed. Just be sure to get the U1 firmware. You might need to use the modified Odin as the phone might think its carrier locked again.
Click to expand...
Click to collapse
Thanks youdoofus for the response. After doing more searching on here the day I posted this, I found I could flash sm-n960u1 firmware onto my phone using the patched Odin. I tried that and I worked like a charm. It completely undid everything the AT&T sim card had done except I think I downloaded a firmware that doesn't have the Hiya app integrated into the phone app like I had before. I downloaded the firmware from sammobile but I can't tell what's what on there really. I downloaded the AIO version since I read on this site that was for cricket. Any thoughts on which firmware I could download that will give me the Hiya integration back? I loved having it on there but I could do without though if need be. Thanks in advance.

ibewurimat78 said:
Thanks youdoofus for the response. After doing more searching on here the day I posted this, I found I could flash sm-n960u1 firmware onto my phone using the patched Odin. I tried that and I worked like a charm. It completely undid everything the AT&T sim card had done except I think I downloaded a firmware that doesn't have the Hiya app integrated into the phone app like I had before. I downloaded the firmware from sammobile but I can't tell what's what on there really. I downloaded the AIO version since I read on this site that was for cricket. Any thoughts on which firmware I could download that will give me the Hiya integration back? I loved having it on there but I could do without though if need be. Thanks in advance.
Click to expand...
Click to collapse
no problem. its almost funny that i called it, step by step before you replied LoL
i havent the foggiest idea what the Hiya app is. My phone is from cricket themselves, but ive flashed the U1 and unistalled all the junk that i didnt recognize lol
my fiancee has a cricket S9 as well and its stock, maybe i can get the apk off hers.

youdoofus said:
no problem. its almost funny that i called it, step by step before you replied LoL
i havent the foggiest idea what the Hiya app is. My phone is from cricket themselves, but ive flashed the U1 and unistalled all the junk that i didnt recognize lol
my fiancee has a cricket S9 as well and its stock, maybe i can get the apk off hers.
Click to expand...
Click to collapse
I just realized that this is a thread for S9s, not Note9 like I have. Sorry everyone. I will post this in the correct thread.

ibewurimat78 said:
I just realized that this is a thread for S9s, not Note9 like I have. Sorry everyone. I will post this in the correct thread.
Click to expand...
Click to collapse
No worries man, im sure that the process for flashing firmware is the same as is the process for getting apps from the tarball. But yeah, youll probably get the back of your hand slapped if we continue talking about your Note 9 in a S9 thread. I might pop over to the Note forum just for funsies LOLOL!!!

Dont know what stock Firmware my phone needs

Good Morning,
So this is the story, I was suddenly having issues with Cell service people were not hearing me I felt like I had to reset the phone and wipe it all so I thought I might as well ROOT it when it came to downloading the firmware I was a bit lost did not know what was the correct one was i threw out the box,
I flashed one but still have this cell issue I feel like its not using all the bands... I have Tmobile and I do not know if the issue is I am flashing wrong firmware.
So 2 questions
how would I know if I am flashing the correct firmware?
And how would I know if that is my issue ?
Please Someone Advise.

tzvblsm said:
Good Morning,
So this is the story, I was suddenly having issues with Cell service people were not hearing me I felt like I had to reset the phone and wipe it all so I thought I might as well ROOT it when it came to downloading the firmware I was a bit lost did not know what was the correct one was i threw out the box,
I flashed one but still have this cell issue I feel like its not using all the bands... I have Tmobile and I do not know if the issue is I am flashing wrong firmware.
So 2 questions
how would I know if I am flashing the correct firmware?
And how would I know if that is my issue ?
Please Someone Advise.
Click to expand...
Click to collapse
I would test another carrier first, or the same carrier in another area. Also test with different people in different areas. This is most often an issue on the carrier side, not the device.
So my advice: make sure your issue is the device. Only after that we can talk about flashing another ROM.

Thanks @arsradu for your quick reply Its definitely not the carrier I just am not sure what the problem is, I was thinking each firmware has its own optimizations for the bands it should use,
I bought it on amazon USA
And currently flashed
TROIKA_RETAIL_10_QSBS30.62-17-13_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml
I tried using LMSA to restore my phone to factory settings and it gives me an error I wish I can just go back to stock clean.

tzvblsm said:
Thanks @arsradu for your quick reply Its definitely not the carrier I just am not sure what the problem is, I was thinking each firmware has its own optimizations for the bands it should use,
I bought it on amazon USA
And currently flashed
TROIKA_RETAIL_10_QSBS30.62-17-13_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml
I tried using LMSA to restore my phone to factory settings and it gives me an error I wish I can just go back to stock clean.
Click to expand...
Click to collapse
Assuming you bought a US model, which works on all major carriers, your version should be RETUS.
With the bat file that was provided here in the forum, you should be able to fast boot flash it.

tzvblsm said:
Thanks @arsradu for your quick reply Its definitely not the carrier I just am not sure what the problem is, I was thinking each firmware has its own optimizations for the bands it should use,
I bought it on amazon USA
And currently flashed
TROIKA_RETAIL_10_QSBS30.62-17-13_subsidy-DEFAULT_regulatory-DEFAULT_CFC.xml
I tried using LMSA to restore my phone to factory settings and it gives me an error I wish I can just go back to stock clean.
Click to expand...
Click to collapse
It can be the ROM, as well. In my experience though it’s usually not the case.
Anyway, what’s your device model? Is it xt2013-4? Did you make a backup of your original ROM so you can restore it later on?
Also, what is the error you get when trying to use LMSA to restore?

Yes my model number is xt2013-4 no i did not make a backup I uploaded a screenshot of the error message. and I guess I will try reatilUS I tried the simple retail option the last one not sure what retail and retail us differences are,
https://imgur.com/17b3ltY

tzvblsm said:
Yes my model number is xt2013-4 no i did not make a backup I uploaded a screenshot of the error message. and I guess I will try reatilUS I tried the simple retail option the last one not sure what retail and retail us differences are,
https://imgur.com/17b3ltY
Click to expand...
Click to collapse
RETUS with the above linked bat has worked fine for a XT2013-04 I have worked with, I assume it would with yours too :good:
I cannot speak to the assistant error though, never used it...
Side note: don't forget to add the code line for the 10th chunks to the bat.

Does Any one know what are the differences between Firmware's that are made for this phone ? for example
AMZ
Retail
Reatus

tzvblsm said:
Does Any one know what are the differences between Firmware's that are made for this phone ? for example
AMZ
Retail
Reatus
Click to expand...
Click to collapse
AMZ is the Amazon Ads model,
Retail can be US retail with different bands.
Retus is what I flashed in the past on a US phone that worked with all 4 carriers and it never had any issues.

Samsung Galaxy s9 Demo Security Error

Hello! This is my first post on any forum ever, so please be gentle.
Recently I dumpster dove behind a U.S. Cellular that had just gone out of business and I found this neat Samsung Galaxy S9 Live Demo phone. It was originally flashed with an SM-G960XU Firmware, but I wanted to de-demo mode it, so I thought I would flash an SM-G960U firmware on it instead.
This failed miserably and I now have the following error: "Security Error: This phone has been flashed with unauthorized software...". A picture of the error, as well as the other information I have been able to glean from the locked phone is attached.
Unfortunately, I knew nothing about androids before attempting to flash the phone, so I have no other data about the phone other than what is in the pictures.
Any help would be greatly appreciated.
Thank you very much,
Oronto

Meh... you have a parts queen, less the mobo.

Demo unit should be missing the baseband chip hardware inside, so even if you could flash the stock firmware you would be limited to using it with wifi.
Apart from that, what happens if you try to flash again with odin? i would try flashing the precedent firmware G960XU

effry said:
Demo unit should be missing the baseband chip hardware inside, so even if you could flash the stock firmware you would be limited to using it with wifi.
Apart from that, what happens if you try to flash again with odin? i would try flashing the precedent firmware G960XU
Click to expand...
Click to collapse
Hi effry,
Thank you for your response. I would love to reflash it with its original firmware but I can’t find it anywhere on the internet! I did not realize I was supposed to back up the firmware before flashing it which was quite the mistake. Do you happen to know where I might be able to find this firmware?
Thank you very much,
Oronto

Start from here and check the exact phone model with the IMEI, it is printed on the bottom of the back of the phone (use a strong light, it's a small and light text)
Check Samsung IMEI information in SamFw.com
You can check Samsung IMEI information like Model, Region. And you can choose the exact firmware
samfw.com
After that you can use the same site to search for the correct firmware , donwload it and flash it with Odin

blackhawk said:
Meh... you have a parts queen, less the mobo.
Click to expand...
Click to collapse
Hi Blackhawk,
Thanks for the response. What do you mean by a parts queen? Do you mean I should sell it for parts on eBay?
Thanks,
Oronto

Oronto said:
Hi Blackhawk,
Thanks for the response. What do you mean by a parts queen? Do you mean I should sell it for parts on eBay?
Thanks,
Oronto
Click to expand...
Click to collapse
A hangar queen is the actual terminology. An aircraft used for donor parts to keep others flying.
The display, frame, battery, C port pcb, cam module should be good. The mobo is useless for use as a phone except as noted with wifi.
So if you have another phone of the same model... you now have an Android queen

effry said:
Start from here and check the exact phone model with the IMEI, it is printed on the bottom of the back of the phone (use a strong light, it's a small and light text)
Check Samsung IMEI information in SamFw.com
You can check Samsung IMEI information like Model, Region. And you can choose the exact firmware
samfw.com
After that you can use the same site to search for the correct firmware , donwload it and flash it with Odin
Click to expand...
Click to collapse
Hi effry,
Thank you again! I input the model’s serial number into the website you linked and it returned that the firmware is SM-G960XZKUXAR. Unfortunately, that website doesn’t have the firmware that it tells me the phone is supposed to have. I checked elsewhere on the internet but I can’t seem to find it. Is there an obscure website you know of that might have it?
Alternatively, do you think it is possible that I could flash it with another equivalent firmware? If so, what might you suggest?
Thank you very much,
Oronto

blackhawk said:
A hangar queen is the actual terminology. An aircraft used for donor parts to keep others flying.
The display, frame, battery, C port pcb, cam module should be good. The mobo is useless for use as a phone except as noted with wifi.
So if you have another phone of the same model... you now have an Android queen
Click to expand...
Click to collapse
Hi blackhawk,
Thank you for your insight into which parts seem useful for scrapping. It is looking like I might have to do that. Unfortunately, I do not have an equivalent model, so I will have to sell it for parts if it comes down to that.
Thanks again,
Oronto

Oronto said:
Hi effry,
Thank you again! I input the model’s serial number into the website you linked and it returned that the firmware is SM-G960XZKUXAR. Unfortunately, that website doesn’t have the firmware that it tells me the phone is supposed to have. I checked elsewhere on the internet but I can’t seem to find it. Is there an obscure website you know of that might have it?
Alternatively, do you think it is possible that I could flash it with another equivalent firmware? If so, what might you suggest?
Thank you very much,
Oronto
Click to expand...
Click to collapse
By looking online it seems that flashing the firmware with odin should fix the issue. Maybe you did something wrong in the process? i would try another odin flash using this firmware
Download Galaxy S9 SM-G960U (XAS) G960USQS9FUG2 in Samfw - Samsung firmware download
Galaxy S9 SM-G960U (XAS - United States) G960USQS9FUG2 Q(Android 10) samsung firmware download all model, lastest, fast update, completely free and fast speed in Samfw.com ✅
samfw.com

If it doesn't work, i found the SM-G960X files here, this should be the full DEMO firmware
G960XUSQU3CSAB-(VZW)(Firmware 5 Files + USERDATA) (Android 9 Pie) File By (www.needromarab.Com).zip
drive.google.com
There are also some interesting download here, they say to be the complete firmware but for some reason they are just 1 gb size instead of 4.4gb like the others so i don't know
Samsung SM-G960X Combination File ROM (Flash File)
Download Samsung SM-G960X Combination File (original flash file, rom) without any password for Free. We also provide the combination file for all Samsung devices.
samsungcombinationfile.com

effry said:
If it doesn't work, i found the SM-G960X files here, this should be the full DEMO firmware
G960XUSQU3CSAB-(VZW)(Firmware 5 Files + USERDATA) (Android 9 Pie) File By (www.needromarab.Com).zip
drive.google.com
There are also some interesting download here, they say to be the complete firmware but for some reason they are just 1 gb size instead of 4.4gb like the others so i don't know
Samsung SM-G960X Combination File ROM (Flash File)
Download Samsung SM-G960X Combination File (original flash file, rom) without any password for Free. We also provide the combination file for all Samsung devices.
samsungcombinationfile.com
Click to expand...
Click to collapse
Hi effry,
Thank you very much for all of these options! I will try them all when I get home and let you know if I have any success.
Thanks again,
Oronto

effry said:
If it doesn't work, i found the SM-G960X files here, this should be the full DEMO firmware
G960XUSQU3CSAB-(VZW)(Firmware 5 Files + USERDATA) (Android 9 Pie) File By (www.needromarab.Com).zip
drive.google.com
There are also some interesting download here, they say to be the complete firmware but for some reason they are just 1 gb size instead of 4.4gb like the others so i don't know
Samsung SM-G960X Combination File ROM (Flash File)
Download Samsung SM-G960X Combination File (original flash file, rom) without any password for Free. We also provide the combination file for all Samsung devices.
samsungcombinationfile.com
Click to expand...
Click to collapse
Hello again effry,
I tried your firmwares and bad things have happened. It got to where the download was almost finished and then it displayed this error. Unfortunately Smart Switch Emergency Software Recovery does not register it as connected.
I believe I am boned. Thoughts on this?
Thanks,
Oronto

Oronto said:
Hello again effry,
I tried your firmwares and bad things have happened. It got to where the download was almost finished and then it displayed this error. Unfortunately Smart Switch Emergency Software Recovery does not register it as connected.
I believe I am boned. Thoughts on this?
Thanks,
Oronto
Click to expand...
Click to collapse
You could just replace the motherboard from Ebay for around 50 bucks (USD). Make sure it's a regular unlocked version (both FRP and network), any carrier will do since you can cross flash any firmware of your choice (no need for the demo anymore). Just a heads up, demo units sometimes are missing some of the LTE antenna cables/connectors, which would prevent the good replacement main board from working on cellular.

billa said:
You could just replace the motherboard from Ebay for around 50 bucks (USD). Make sure it's a regular unlocked version (both FRP and network), any carrier will do since you can cross flash any firmware of your choice (no need for the demo anymore). Just a heads up, demo units sometimes are missing some of the LTE antenna cables/connectors, which would prevent the good replacement main board from working on cellular.
Click to expand...
Click to collapse
Hi billa,
Thanks for the advice. I’ll look into it, but I might end up just selling it for parts.
Thanks,
Oronto