Convert Cricket S9 to T-Mobile S9? - Samsung Galaxy S9 Questions & Answers

Hi, I'm thinking of buying a Cricket locked Galaxy S9, buying an unlock code to unlock, and flashing it to the T-Mobile firmware. I have two questions I'm trying to clarify:
1) Cricket lacks a handful of bands that T-Mobile uses. Will the T-Mobile firmware allow me to use those bands?
2) Will the process of flashing the firmware trip Knox?
Thanks!

fallenturtle said:
Hi, I'm thinking of buying a Cricket locked Galaxy S9, buying an unlock code to unlock, and flashing it to the T-Mobile firmware. I have two questions I'm trying to clarify:
1) Cricket lacks a handful of bands that T-Mobile uses. Will the T-Mobile firmware allow me to use those bands?
2) Will the process of flashing the firmware trip Knox?
Thanks!
Click to expand...
Click to collapse
Hello,
I just completed this exact thing today. I received the phone from cricket today and ordered the unlock code ( got in with in an hour). After that I flashed G960USQS3BRK2 with odin 3.13.1.
tomorrow I will be able to test bands , I can confirm that knox was not tripped.
If you need more details feel free to PM me

Good to hear! May I ask where you got the unlock code and how much it cost you?

T-Mobile S9 Bands
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B18(800), B19(800), B20(800), B25(1900), B26(800), B66(AWS-3), B71 (600MHz)
4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)
Cricket S9 bands
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B18(800), B19(800), B20(800), B28(700), B29(700), B30(2300)
4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)
Bands Cricket S9 doesn't support
B13, B26, B66, B71
T-Mobile Operates on these
B2, B4, B5, B12, B66, B71
Spectrum Gateway
They have a very nice map where you can zoom into a desired location and see what freq/bands T-Mobile is authorized to use. Be warned however.. The map is based on individual counties and a tower might not be available in the area. Some areas might not have the appropriate equipment to provide coverage in certain bands or there might network outages that might temporarily effect coverage that in other times but be there.
Only bands you'll be missing out on is B66 which augments and improves on B4. B71 which is the newer band T-Mobile is deploying in the more rural areas of the U.S to provide coverage.

fallenturtle said:
Hi, I'm thinking of buying a Cricket locked Galaxy S9, buying an unlock code to unlock, and flashing it to the T-Mobile firmware. I have two questions I'm trying to clarify:
1) Cricket lacks a handful of bands that T-Mobile uses. Will the T-Mobile firmware allow me to use those bands?
2) Will the process of flashing the firmware trip Knox?
Thanks!
Click to expand...
Click to collapse
fallenturtle said:
Good to hear! May I ask where you got the unlock code and how much it cost you?
Click to expand...
Click to collapse
Okay so all the bands that are enabled on my T mobile branded S9 were enabled on the Cricket s9 after the flash. I purchased the unlock code from https://www.cellunlocker.net/. Cost was 24.99 and i received the code in less than an hour. All features working (wifi calling, video calling, visual voicemail etc). On the first two reboots after the flash the phone will be really hot. You might still get the cricket boot animation on the first boot, it will restart ones again and you should see the t mobile boot animation then.
Let me know how it goes!

Everything went great! Thank you for your input.

Related

[Q] Note 4 Band Question

So here's where i am confused. I can looked up and found that these are the LTE bands for Verizon note 4 ,Network: LTE Band 13/4 (700/1700 MHz), CDMA/1xEVDO Rev. A (800/1900 MHz);
While dubai requires 1800/2600Mhz; for 4G.
ATT note 4 supports these bands while Verizon doesn't. and i cant buy ATT note 4 since it wont work wit Verizon
Whats the Solution ?
Will unlocking the phone open up all the bands ? 2g/3g works fine im just concerning with 4G overseas
Thank you,
GD
You must buy the Note 4 that is made for India which is a SM-N910G or SM-N910U
Network/Bearer
Multi-SIM
Single-SIM
SIM size
Micro-SIM (3FF)
Infra
2G GSM, 3G WCDMA, 4G LTE FDD, 4G LTE TDD
2G GSM
GSM850, GSM900, DCS1800, PCS1900
3G UMTS
B1(2100), B2(1900), B5(850), B8(900)
4G FDD LTE
B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B28(700)
4G TDD LTE
B38(2600), B40(2300)
outcasted2003 said:
You must buy the Note 4 that is made for India which is a SM-N910G or SM-N910U
Network/Bearer
Multi-SIM
Single-SIM
SIM size
Micro-SIM (3FF)
Infra
2G GSM, 3G WCDMA, 4G LTE FDD, 4G LTE TDD
2G GSM
GSM850, GSM900, DCS1800, PCS1900
3G UMTS
B1(2100), B2(1900), B5(850), B8(900)
4G FDD LTE
B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B28(700)
4G TDD LTE
B38(2600), B40(2300)
Click to expand...
Click to collapse
Can i use that with verizon when im in the states ?
I'm not sure but I don't think so. I think Verizon sells a SIM card for their USA phones to be used abroad.
outcasted2003 said:
I'm not sure but I don't think so. I think Verizon sells a SIM card for their USA phones to be used abroad.
Click to expand...
Click to collapse
Thats the problem, im trying to figure out if im able to root my note 4 verzion, will that unlock all the bands , or its a built in thing

Sprint Note 5 (SM-N920P) on AT&T

I'm not really sure where to ask this because it doesn't really fit into the Sprint or AT&T forums. Still, given that the question is about the AT&T network, I figured this might be the better spot.
I am upgrading to the Note 8 and I was hoping to give my Note 5 (that I own outright) to my girlfriend who is on AT&T. I tested it out and configured the APN properly and I think all is well. There is some wonkiness is maintaining the LTE connection, though. I looked into it and it looks like there is a difference between the two models as far as the bands go.
Code:
Sprint Note 5 (SM-N920P):
Infra: 2G GSM,2G CDMA,3G WCDMA,3G CDMA,4G LTE FDD,4G LTE TDD;
2G GSM: GSM850, GSM900, DCS1800, PCS1900;
2G CDMA: CDMA800 ,USPCS1900;
3G UMTS: B1(2100), B2(1900), B5(850), B8(900);
3G CDMA: BC0(800), BC1(1900), BC10(800);
4G FDD LTE: B2(1900), B4(AWS), B5(850), B12(700), B25(1900), B26(800);
4G TDD LTE: B41(2500)
Code:
AT&T Note 5 (SM-N920A):
Infra: 2G GSM, 3G WCDMA, 4G LTE FDD;
2G GSM: GSM850, GSM900, DCS1800, PCS1900;
3G UMTS: B1(2100), B2(1900), B5(850);
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B17(700), B20(800), B29(700), B30(2300)
It looks like the Sprint variant lacks B1, B3, B7, B8, B17, B20, B29, B30
I don't think AT&T heavily uses all of these bands, though. My main question is - Functionally, what type of performance should I expect? Will she get satisfactory service from AT&T despite these missing bands?
ctasich said:
I am upgrading to the Note 8 and I was hoping to give my Note 5 (that I own outright) to my girlfriend who is on AT&T. I tested it out and configured the APN properly and I think all is well. There is some wonkiness is maintaining the LTE connection, though. I looked into it and it looks like there is a difference between the two models as far as the bands go.
Code:
Sprint Note 5 (SM-N920P):
4G FDD LTE: B2, B4, B5, B12, B25, B26, B41
Code:
AT&T Note 5 (SM-N920A):
4G FDD LTE: B1, B2, B3, B4, B5, B7, B8, B17, B20, B29, B30
I don't think AT&T heavily uses all of these bands, though. My main question is - Functionally, what type of performance should I expect? Will she get satisfactory service from AT&T despite these missing bands?
Click to expand...
Click to collapse
Right. AT&T uses bands 2,4,5,17 with 17 being the main LTE band. I had the same situation with my Verizon variant (just switched to AT&T prepaid, yay save money, rip wifi calling) and I want the main band 17 for times when I travel back home from college, so I can have coverage. The main thing is that if you're noticing LTE issues now, it's not going to get better unless you get a phone that supports band 17. I just happened to have an iphone 6 plus laying around that I threw my SIM into temporarily and I've noticed better coverage because it supports all the bands.
TL;DR It will work, it just won't be optimal since you're missing the main LTE band. Get a phone that supports bands 2,4,5,17 if you want optimal performance. And depending on where you are and how your coverage is, you might need it in order for your service to be satisfactory.
ctasich said:
I'm not really sure where to ask this because it doesn't really fit into the Sprint or AT&T forums. Still, given that the question is about the AT&T network, I figured this might be the better spot.
I am upgrading to the Note 8 and I was hoping to give my Note 5 (that I own outright) to my girlfriend who is on AT&T. I tested it out and configured the APN properly and I think all is well. There is some wonkiness is maintaining the LTE connection, though. I looked into it and it looks like there is a difference between the two models as far as the bands go.
Code:
Sprint Note 5 (SM-N920P):
Infra: 2G GSM,2G CDMA,3G WCDMA,3G CDMA,4G LTE FDD,4G LTE TDD;
2G GSM: GSM850, GSM900, DCS1800, PCS1900;
2G CDMA: CDMA800 ,USPCS1900;
3G UMTS: B1(2100), B2(1900), B5(850), B8(900);
3G CDMA: BC0(800), BC1(1900), BC10(800);
4G FDD LTE: B2(1900), B4(AWS), B5(850), B12(700), B25(1900), B26(800);
4G TDD LTE: B41(2500)
Code:
AT&T Note 5 (SM-N920A):
Infra: 2G GSM, 3G WCDMA, 4G LTE FDD;
2G GSM: GSM850, GSM900, DCS1800, PCS1900;
3G UMTS: B1(2100), B2(1900), B5(850);
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B17(700), B20(800), B29(700), B30(2300)
It looks like the Sprint variant lacks B1, B3, B7, B8, B17, B20, B29, B30
I don't think AT&T heavily uses all of these bands, though. My main question is - Functionally, what type of performance should I expect? Will she get satisfactory service from AT&T despite these missing bands?
Click to expand...
Click to collapse
I have SM-N920P (Sprint), i want to add additional hidden LTE Bands using the procedure described in this post
https://forum.xda-developers.com/galaxy-s5/general/how-to-add-rf-lte-frequency-bands-to-t2886059
Does it will work with this Model (SM-N920P) or not ?
How i could know if this mobile support additional hidden LTE bands ?
please help me.

Exynos LTE Bands

Does anyone have any information on the bands the Exynos model will support?
I know that the S8 was missing band 30 for ATT. Besides that, what would I miss by getting an international version over the US unlocked one?
If Clove is to be believed, the Exynos S9 this year is missing even more bands than the S8 of last year. It is missing band 12 for T-Mobile, for example, while last year's had it. There's some conflicting information depending on models (dual sim or single sim SM-G960F), but here is what I see:
FrequenciesLTE Bands: FDD: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B17(700), B20(800), B28(700), B32(1500), B66(AWS- 3) | TDD: B38(2600), B39(1900), B40(2300), B41(2500)
-Collin-
Check this site www.frequencycheck.com - here is the link sm-965F galaxy s9+ model
https://www.frequencycheck.com/mode...-lte-galaxy-s9-plus-samsung-star-2?c_id=78864
I cannot say how accurate the information is.
5teve0 said:
Check this site www.frequencycheck.com - here is the link sm-965F galaxy s9+ model
https://www.frequencycheck.com/mode...-lte-galaxy-s9-plus-samsung-star-2?c_id=78864
I cannot say how accurate the information is.
Click to expand...
Click to collapse
Well that is certainly more promising than what I found on the Clove listing, and certain SM-G96XF on eBay list the same frequencies. Great news! I think I'll get one and try it out on T-Mobile
-Collin-
CollinFX45 said:
Well that is certainly more promising than what I found on the Clove listing, and certain SM-G96XF on eBay list the same frequencies. Great news! I think I'll get one and try it out on T-Mobile
-Collin-
Click to expand...
Click to collapse
Let us know when you do. Unfortunately, it looks pretty sure B71 (600) is out, so let us know how the performance and speeds are on TMo otherwise.
Might be a bit late, but here is the lte band info for the sm-g965f on samsung uk site---
http://www.samsung.com/uk/smartphones/galaxy-s9/specs/

Note 10+ Hong Kong Dual Sim version for T-Mobile?

I am shopping for a Note 10+ 512gb to be used on T-Mobile network while in US. It appears none of the US carrier or unlocked Note 10+ come with dual sim. So my only option is to get Hong Kong version.
1. Does anyone know if Hong Kong version has all the radio frequency needed for T-Mobile? Below is what I copied from online spec.
2. Does Note 10+'s dual sim work the same way as iPhone XS Max? Which both sim are on standby for call and text, you can select one of them for data in setting?
3. If I remember correctly, Note 8 dual sim can have one sim on 3g while the other one on LTE. Is this still the case or its limited to 2g only? Thank!
SM-N9750/DS (Dual SIM)
Snapdragon 855
2G: CDMA 800, GSM 850/900/1800/1900
3G: CDMA2000, TD-SCDMA 1900/2000, UMTS 850/900/1900/2100
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700)
4G TDD LTE: B34(2010), B38(2600), B39(1900), B40(2300), B41(2500)
Just get a device intended for use in your country, in xda there are tons of posts from people doing as you want and with bad luck end having some troubles, the worst one beeing no way to claim warranty, but that is just my opinion...
To answer my own question and for those who are interested. Note 10+ Hong Kong Dual Sim version is missing LTE band 66 and 71 that T-Mobile USA uses. 66 is usually used in stadium and arenas to ease congestion, where 71 covers some rural areas for extended reach. You will be fine with the HK version if you are using the devices mainly in metropolitan area. But since HK version also lack many other bands that US unlocked version offers, some of them maybe used by Sprint (which I don’t have time to research). It means you may not be benefiting from improved coverage if T-Mobile and Sprint join together.
It looks like US unlocked version has the most comprehensive band coverage among all models, domestic and international. If I am not wrong, it has every band available in Note 10+ lineup. For those who doesn’t need dual sim, US unlocked version is the best choice as far as network compatibility wise.
I'm using the N9750 on T-Mobile. Dual SIM works and both SIMS are 4G simultaneously. I have no issues with service. WiFi and VOLTE work. I know T-Mobile uses bands 66 and 71 in some areas but it really doesn't make a difference where I live.

is it worth to Trade in my exynos note 10 plus for Snapdragon note 10 plus ?

Which is better one ?
Depends, if you care about root exynos. If you want speed and les lag snapdragon.
tamerh said:
Which is better one ?
Click to expand...
Click to collapse
If you want a Snapdragon with unlocked bootloader that you can root then get the SM-N9750/DS. Or keep your Exynos. Those are your only options if you want root. I'm surprised more people don't get the international Snapdragon, it's like they only think the Exynos exists.
ajsmsg78 said:
If you want a Snapdragon with unlocked bootloader that you can root then get the SM-N9750/DS. Or keep your Exynos. Those are your only options if you want root. I'm surprised more people don't get the international Snapdragon, it's like they only think the Exynos exists.
Click to expand...
Click to collapse
People buy what's offered in their region...
If you get a unit that requires a warranty repair , out of region phones are not covered and it can be expensive and time consuming to get fixed..
Considering the expense already it comes with peace of mind to be able to get things RMA'ed easily.
I got my Note 10+ and literally the next day I had to get it fixed due the S-Pen not coming out. Got my phone back, had it for less than a day and had to return it due to the power button becoming defective too.
I know this is not really the norm but these things do happen and what took a few days to fix could have been weeks or months otherwise if purchased outside my region...
The Snapdragon is a superior chip and is more efficient so totally your call. Warranty might be and issue
Just enjoy the phone you have your talking minimal gains Vs a possible loss of RMA /warranty
Not worth it.
Sent from my SM-N975F using Tapatalk
A more detailed comparison has to be made:
SM-N9750/DS (Dual SIM)
SM-N9758
Snapdragon 855 China
Hong Kong
Brazil
2G: CDMA 800, GSM 850/900/1800/1900
3G: CDMA2000, TD-SCDMA 1900/2000, UMTS 850/900/1900/2100
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700)
4G TDD LTE: B34(2010), B38(2600), B39(1900), B40(2300), B41(2500)
SM-N975F Exynos 9825 Europe
2G GSM: GSM850, GSM900, DCS1800, PCS1900
3G UMTS: B1(2100), B2(1900), B4(AWS), B5(850), B8(900)
3G TD-SCDMA: B34(2010), B39(1880)
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B17(700), B18(800), B19(800), B20(800), B25(1900), B26(800), B28(700), B32(1500), B66(AWS- 3)
4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)
megatooth said:
A more detailed comparison has to be made:
SM-N9750/DS (Dual SIM)
SM-N9758
Snapdragon 855 China
Hong Kong
Brazil
2G: CDMA 800, GSM 850/900/1800/1900
3G: CDMA2000, TD-SCDMA 1900/2000, UMTS 850/900/1900/2100
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B18(800), B19(800), B20(800), B25(1900), B26(850), B28(700)
4G TDD LTE: B34(2010), B38(2600), B39(1900), B40(2300), B41(2500)
SM-N975F Exynos 9825 Europe
2G GSM: GSM850, GSM900, DCS1800, PCS1900
3G UMTS: B1(2100), B2(1900), B4(AWS), B5(850), B8(900)
3G TD-SCDMA: B34(2010), B39(1880)
4G FDD LTE: B1(2100), B2(1900), B3(1800), B4(AWS), B5(850), B7(2600), B8(900), B12(700), B13(700), B17(700), B18(800), B19(800), B20(800), B25(1900), B26(800), B28(700), B32(1500), B66(AWS- 3)
4G TDD LTE: B38(2600), B39(1900), B40(2300), B41(2500)
Click to expand...
Click to collapse
Hi,
Just visited some samsung store in shanghai and I can tell you that in mainland china there are no sm-n9750, currently there are no 4g versions available of the note 10+. They only sell the 5g versions with the exact same characteristics as the sm-n9750/DS but with 5g support (thanks cpt obvious) with the following bands : N42 (2500), N78 (3500) and N79 (4500). the 5g versions is under the name sm-9760/DS. And it should also have the unlocked bootloader. Oh and it is sold the same price as the 4g version elsewhere and with google framework installed on it but deactivated until you connect to a network that don't block google..
tamerh said:
Which is better one ?
Click to expand...
Click to collapse
Honestly there isn't a huge difference that you would notice. I have an exynos version here but I have a friend who bought the snapdragon version from the States. To be honest it seems the battery life is better on my exynos as he gets way less SOT on his phone and we both are medium to high users.
Firdt i bough ex version and sold after 5 days because of poor network signal . After 15 days i bough snap version and i dont have any problems with signal. For me its worth to change ex with sd. I have dual sim hk version
dule2303 said:
Firdt i bough ex version and sold after 5 days because of poor network signal . After 15 days i bough snap version and i dont have any problems with signal. For me its worth to change ex with sd. I have dual sim hk version
Click to expand...
Click to collapse
This is a problem with the bands supported by the modem
Different models support different bands in different countries
Reaper1337 said:
This is a problem with the bands supported by the modem
Different models support different bands in different countries
Click to expand...
Click to collapse
Thats is one reason to buy devices intended for use in your specific country, other major consideration is WARRANTY, I have claimed warranty in several ocasions, with devices obtained from my carrier, it is really difficult if not impossible when you buy a device from other country
winol said:
Thats is one reason to buy devices intended for use in your specific country, other major consideration is WARRANTY, I have claimed warranty in several ocasions, with devices obtained from my carrier, it is really difficult if not impossible when you buy a device from other country
Click to expand...
Click to collapse
That is true, but it also depends on where you buy it from - I have purchased many of my Exynos phones from Clove UK - and their customer support is fantastic. I had an issue when I bought the S9Plus - phone calls were dropping constantly - I tried everything to fix it and nothing worked - I sent back to Clove and they replaced it - pretty quick turn around - Now that happened within a week of when I bought it and I don't know what would have happened if I had a Warrenty issue after like six months or something - but I am just saying that some retailers will provide very good service and help with warranty repairs.
eagleone1 said:
Honestly there isn't a huge difference that you would notice. I have an exynos version here but I have a friend who bought the snapdragon version from the States. To be honest it seems the battery life is better on my exynos as he gets way less SOT on his phone and we both are medium to high users.
Click to expand...
Click to collapse
That is not true as the Snapdragon is definitely the superior chip. If you looknat the architecture of both then you will see that Snapdragon would have better battery life and performance.
Your friend might be using the Snapdragon and getting less battery life as you two don't have exactly the same usage. If you used his phone the same way you use your own phone then you will see that Snapdragon will get better battery life.
When signal is weak snap performs better,im in europe and by default ex is for our country but snap is superior chip,better reception,better battery better perfomance overall
I have the exynos version and i'm getting 5+/- on screen time, while my brother has the snapdragon and he is getting 7 hours, i'm really pissed...

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