[Q] Unlock AT&T S4 --> T Mobile - AT&T Samsung Galaxy S 4 Q&A, Help & Troubleshootin

Has anyone unlocked the att s4 and gotten it to work 100% with TMOs network?

ohthesepaws said:
Has anyone unlocked the att s4 and gotten it to work 100% with TMOs network?
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Yes, I have. I bought a code from cellunlocker.net, but I think there is a method on here to unlock manually for free. To get data working properly, I enabled AWS HSPA+ from this thread http://forum.xda-developers.com/showthread.php?t=2291589

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[Q] Phone Will work on ATT ?

Got a question, would this phone work on ATT. The bands are compatible right ? People are selling unlock codes do you guys think it will work on the network ?
priyaradha said:
Got a question, would this phone work on ATT. The bands are compatible right ? People are selling unlock codes do you guys think it will work on the network ?
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Yes and no.
Any T-Mobile phone, and vice versa AT&T to T-Mobile, will work on each other's respective networks to some degree. AT&T and T-Mobile's 3G/4G bands are NOT compatible.
However, you will still get EDGE, so technically the phone will work if you only use it as a phone.

Tmobile Version has AT&T LTE support, and unlocked bootloader?

So far it looks like the Tmobile S4 has LTE/HSPA+ support for AT&T, and no real signs of a locked bootloader. Anyone else plan on buying that version and unlocking it if the bootloader is in fact unlocked?
Does anyone know of any apps that would test the LTE/HSPA+ bands the phone is capable of? I want to go into a Tmobile and use a test unit to see if I can get service with my LTE AT&T SIM.
https://explore.t-mobile.com/samsung-galaxy-s4
Edit: Well, it looks like I'll be getting the Tmobile variant unsubsidized and use it on AT&T. Tmobile will unlock the phone if you pay the total cost up front. I just need to find a replacement back cover to rid myself of the stupid Tmobile logo on the back... lol.
xxhorseriderxxx said:
So far it looks like the Tmobile S4 has LTE/HSPA+ support for AT&T, and no real signs of a locked bootloader. Anyone else plan on buying that version and unlocking it if the bootloader is in fact unlocked?
Does anyone know of any apps that would test the LTE/HSPA+ bands the phone is capable of? I want to go into a Tmobile and use a test unit to see if I can get service with my LTE AT&T SIM.
https://explore.t-mobile.com/samsung-galaxy-s4
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If I had the money to buy the S4 outright for full price, I would just get an i9505.
EDIT: Spoke too soon. The i9505 doesn't support AT&T's LTE bands.
Can you post info on the source? I was also curious about this but i was thinking if we changed the radios like they did in the past that maybe we could get something working?
XsMagical said:
Can you post info on the source? I was also curious about this but i was thinking if we changed the radios like they did in the past that maybe we could get something working?
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I put the info in the OP that I have so far; the LTE/3G radios are reported to support all of AT&T's bands. The bootloader, I'm going off of a guess since I don't think that Tmobile could afford to bribe Samsung to lock their bootloaders for them.
HMM, ok thanks for the info so far. I might have to go out and pick one up and test it.
Looks like the T-Mobile version has all the same bands and some extra ones added in. For instance the at&t only has lte bands 4&17. The tmobile version has LTE bands 1,2,4,5,7&17. Will T-Mobile unlock their phones for u??
Sent from my SAMSUNG-SGH-I337 using xda app-developers app
I dnot know t mobile has att lte but i am using att phone with t mobile sim in it and i am getting 12-15 Mbps speed.
http://forum.xda-developers.com/showpost.php?p=40888195&postcount=46
T-Mobile:
HSPA+ Bands: I (UMTS 2100), II (1900), IV (1700/2100/AWS), V (850)
LTE Bands: Band 1 (2100), 2 (1900), 4 (1700/2100), 5(850), 7 (2600) & 17
GSM Bands: 850, 900, 1800, 1900
Rogers - Applies for Bell and Telus:
GSM Bands:850/900/1800/1900
HSPA+/HSPA Bands:850/1900/2100
LTE Bands:2100/2600
AT&T:
4G-LTE Band 4 and 17
3G - UMTS 850/1900/2100MHz
GSM/GPRS/EDGE 850/900/1800/1900MHz
T-Mobile Bootloader Locked or Unlocked ?
xxhorseriderxxx said:
So far it looks like the Tmobile S4 has LTE/HSPA+ support for AT&T, and no real signs of a locked bootloader. Anyone else plan on buying that version and unlocking it if the bootloader is in fact unlocked?
Does anyone know of any apps that would test the LTE/HSPA+ bands the phone is capable of? I want to go into a Tmobile and use a test unit to see if I can get service with my LTE AT&T SIM.
https://explore.t-mobile.com/samsung-galaxy-s4
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I'm feeling like a newbie today cause I have my new T-Mobile Galaxy S4 in front of me & still playing with new features after 3 hours.
Tell me how to check to see if bootloader is unlocked and I'll do it.
Also trying to remember where we go to unlock the developer tools. Only remember that it must be clicked 7 times?
Just remembered, Settings.About Device>Build Number <Click Build Number 7 times, back out and Developer options magically appears.
Now i can go into it and toggle USB debugging. Now I only feel 95% newbie.
Glenn
So .. How do I get TMoble 4G on my HTC One X
What do I have to do get off Edge and onto Tmobile 3g/4g. I have the unlocked HTC One X ... What apps are there, and what steps needs to be followed.
trvlpoet said:
What do I have to do get off Edge and onto Tmobile 3g/4g. I have the unlocked HTC One X ... What apps are there, and what steps needs to be followed.
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Do you realize you are in the S4 forum?
weltwon said:
I'm feeling like a newbie today cause I have my new T-Mobile Galaxy S4 in front of me & still playing with new features after 3 hours.
Tell me how to check to see if bootloader is unlocked and I'll do it.
Also trying to remember where we go to unlock the developer tools. Only remember that it must be clicked 7 times?
Just remembered, Settings.About Device>Build Number <Click Build Number 7 times, back out and Developer options magically appears.
Now i can go into it and toggle USB debugging. Now I only feel 95% newbie.
Glenn
Click to expand...
Click to collapse
you don't have to worry about checking the bootloader, it has already been confirmed to be unlocked
http://forum.xda-developers.com/showthread.php?t=2258476
I love this thread, i cant wait to get the Tmo version of the S4 and return this locked down model.
Stroked from my Dirty Nocturnal'd Galaxy S4
scott14719 said:
Do you realize you are in the S4 forum?
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Oh ... thanx... fustration!!!!
Has anybody tried their T-Mobile phone on AT&T yet?
If so, I have a couple of questions.
1. Can you use the T-Mobile phone to wireless tether (become a wifi hotspot) on AT&T's network? The AT&T version can be used to tether (with a simple hack). I was just wondering if a different .APK would be needed to do the same with the T-Mobile phone on AT&T's network or if the T-Mobile phone already has an APK installed that works on AT&T's network?
2. I realize an existing AT&T sim card can just simply be placed into the sim unlocked T-Mobile phone for it to work, but how would I go about changing the imei and other phone info that AT&T has in their system about the phone? In other words, would AT&T cause problems with anyone using a T-Mobile phone on their network even if the person paid full price for the phone and it is unlocked? Would it be better to have them change the system information at a store versus over the telephone?
3. It is reported that the T-Mobile phone works fine on AT&T's LTE network, has anyone verified this and does the phone show LTE when on AT&T's LTE network?
Thank you for any replies. Hopefully this information can help people decide if they want to buy the T-Mobile S4 to use on AT&T or not.
scott14719 said:
Has anybody tried their T-Mobile phone on AT&T yet?
If so, I have a couple of questions.
1. Can you use the T-Mobile phone to wireless tether (become a wifi hotspot) on AT&T's network? The AT&T version can be used to tether (with a simple hack). I was just wondering if a different .APK would be needed to do the same with the T-Mobile phone on AT&T's network or if the T-Mobile phone already has an APK installed that works on AT&T's network?
2. I realize an existing AT&T sim card can just simply be placed into the sim unlocked T-Mobile phone for it to work, but how would I go about changing the imei and other phone info that AT&T has in their system about the phone? In other words, would AT&T cause problems with anyone using a T-Mobile phone on their network even if the person paid full price for the phone and it is unlocked? Would it be better to have them change the system information at a store versus over the telephone?
3. It is reported that the T-Mobile phone works fine on AT&T's LTE network, has anyone verified this and does the phone show LTE when on AT&T's LTE network?
Thank you for any replies. Hopefully this information can help people decide if they want to buy the T-Mobile S4 to use on AT&T or not.
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Click to collapse
You can, for now, use PDAnet for tethering.
As far as changing the phone to appear as "unknown" to AT&T's system, don't do it without a backup of your /efs folder. I don't recommend doing it either because it's not really worth changing things around to hide that you're on a Tmobile phone, because for the most part, they don't care as long as you're paying them your monthly bill. I personally know a friend who has used her unlocked HTC Amaze on AT&T without issue (she was stuck to 2G speeds). The only way for you to have an "unknown" phone on your account is to use an international model phone such as the HTC one or the i9500 (unconfirmed that the i9300/i9500 model is entered into AT&T's system, I only hèard a rumour that AT&T has the IMEI of those phones in its system). My i9100 currently shows up as "unknown" in my bill statement.
I took a screenshot, but I don't have a link of the LTE working conformation (attached). I won't be getting my phone until I am on holiday in New Hampshire so that I can avoid the sales tax on purchasing the Tmobile variant. I would ask my parents to buy it for me, and I send them the money, but they have no technological skills whatsoëver close to asking/knowing what to ask for at the Tmobile store. Sorry guys, lol.
my t mobile m919 stock mdl rooted..tetheting works out of the box SN at&t and on their system it doesn't know what kind of phone I have...
Sent from my SGS 4

[Q] Confused about factory unlock

Hey guys, so I bought a brand new S4 from walmart the other day, they guys said it was unlocked and my telus sim worked like a charm but when I put it a mobilicity sim it said that it was invalid and asked for an unlock code. Now I know that mobilicity uses AWS etc etc but from what I've heard it should work just that the network would be crappy, but for me it doesn't work at all, my phone rejects the sim. I tried the tutorial posted in this section on unlocking the AWS band but with no success. I'm trying to get this to work for my girlfriend's upcoming birthday so any and all help will be greatly appreciated, thanks!
As far as I know, Walmart does not sell an unlocked Galaxy S4 and neither does any retail store in Canada besides online shops.
Since your phone is requesting an unlock code, you have two options.
Either use the free unlock method posted here on the forums or purchase a code online.
Regarding the AWS frequency unlock for your phone, I believe one of the prerequisites is an unlocked phone in order for it too work.
Sent from my SGH-I337M using Tapatalk 4 Beta
Let us guess which model, is it the Walmart S4 iphone version?
Please provide the model if you need help. PLEASE!
crazymao said:
Hey guys, so I bought a brand new S4 from walmart the other day, they guys said it was unlocked and my telus sim worked like a charm but when I put it a mobilicity sim it said that it was invalid and asked for an unlock code. Now I know that mobilicity uses AWS etc etc but from what I've heard it should work just that the network would be crappy, but for me it doesn't work at all, my phone rejects the sim. I tried the tutorial posted in this section on unlocking the AWS band but with no success. I'm trying to get this to work for my girlfriend's upcoming birthday so any and all help will be greatly appreciated, thanks!
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Click to collapse
Just to clarify, you are mixing terminology:
Unlocked phone - you can use "any" SIM, but you may not get 3G or 4G speed on all carriers due to frequencies - in the USA, I can unlock my AT&T phone to take a T-mo SIM, but it will not get the faster speeds of T-MO
AWS unlock - unlock the phones radio to support additional frequencies. After unlocking the phone to support a T-mo SIM, I can unlock the AWS bands to allow for faster speeds when using a T-mo SIM.
What did you pay for the phone? If it was full price (about $600) then it is possible you could have bought (or paid for) an unlocked phone. If it was a $200 phone, then it is guaranteed to be locked to a particular carrier.
TheAxman said:
Let us guess which model, is it the Walmart S4 iphone version?
Please provide the model if you need help. PLEASE!
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Click to collapse
All the Canadian models are the I337M version.
Monkz said:
All the Canadian models are the I337M version.
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Click to collapse
I am aware all canadian models are i337m, but is is not stated.
Am I blind, where did he mention that in his post, his avatar doesn't have the model.
TheAxman said:
I am aware all canadian models are i337m, but is is not stated.
Am I blind, where did he mention that in his post, his avatar doesn't have the model.
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Click to collapse
He mentioned that it was a Canadian phone in his post. He said his Telus SIM which came with it worked in it and Telus is a Canadian carrier.
Monkz said:
He mentioned that it was a Canadian phone in his post. He said his Telus SIM which came with it worked in it and Telus is a Canadian carrier.
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Click to collapse
My bad, it is in op.
if he unlocks it, it will work with the Telus sim, Umm I saw a post similar to this with a fix, be back shortly.

T-Mobile on AT&T network

Will T-Mobile S5 work on AT&T LTE. I'm thinking yes but just want someone to confirm please.
bkeaver said:
Will T-Mobile S5 work on AT&T LTE. I'm thinking yes but just want someone to confirm please.
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yes i have two ATT s5 will work first get it factory unlock fleabay $15
then input t-mobile use unlock code set APN for LTE
reboot phone wait few minutes everything will kick in

Unlocked Sprint LS997 on Verizon?

I am using a Sprint unlocked phone on AT&T and works perfectly. Last night I tried my friends Verizon SIM card and it read everything perfectly. It recognized his phone number, network state well. Does this mean I can use it on Verizon? But when I check the IMEI with Verizon it says incompatible! Any input?
My guess is they don't officially support it but since it supports the right lte bands it will work on 4g but maybe not 3g.... Out of curiosity because I may need to do the same thing in the future how did you get the Sprint V20 unlocked
jesmann said:
My guess is they don't officially support it but since it supports the right lte bands it will work on 4g but maybe not 3g.... Out of curiosity because I may need to do the same thing in the future how did you get the Sprint V20 unlocked
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I used a remote unlock service through ebay.
What version of the software did you have when you unlocked it ?

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