Develop Bugs

[Q] at&t 4g on unlocked tmobile galaxy s3??

I have a unlocked t mobile galaxy s3 I'm using on at&t network and I only get 3g but my download speeds are 4 to 5 mb. Which is pretty decent but I was wondering if there was a way to get AT&T 4g? Maybe it's my apn setting issue? Any tips.....

What data plan are you on (medianet/dumb phone, fauxG, LTE)? I've rarely had issues with my unlocked phones having the wrong APN on AT&T, but here are the APNs: medianet is wap.cingular, 4G/HSPA+ is phone, and 4G LTE is pta.
That's about what I get on medianet. I've got as high as 8Mbps on pta but it varies and it's never been consistent for me. 3-5Mbps is normal for my HSPA+ in my area (Olympia, WA). I get about the same speeds in southern CA and tended to get better speeds by 1-2Mbps in Austin, TX.
If you're asking if it's possible to get LTE on the T999, I have no idea. ;P The MSM8960 (S4 SoC in both phones) does support it natively but I don't know if it's possible to enable the LTE modem in software. You could try flashing an AT&T modem but I doubt it's that simple.

Ok maybe I'm wrong but isn't the t-mobile galaxy s3 the only one that didn't come lte equipped because t-mobile uses hspa+?
Sent from my SPH-L710 using xda app-developers app

how did you unlock, I got the unlock code from cellunlockers but after following all the different instructions in their email it sill won't unlock

Rev3ge07 said:
Ok maybe I'm wrong but isn't the t-mobile galaxy s3 the only one that didn't come lte equipped because t-mobile uses hspa+?
Sent from my SPH-L710 using xda app-developers app
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That is correct. It uses HSPA+ 42
Sent from my GT-I9300 using Tapatalk 2

teiglin said:
What data plan are you on (medianet/dumb phone, fauxG, LTE)? I've rarely had issues with my unlocked phones having the wrong APN on AT&T, but here are the APNs: medianet is wap.cingular, 4G/HSPA+ is phone, and 4G LTE is pta.
That's about what I get on medianet. I've got as high as 8Mbps on pta but it varies and it's never been consistent for me. 3-5Mbps is normal for my HSPA+ in my area (Olympia, WA). I get about the same speeds in southern CA and tended to get better speeds by 1-2Mbps in Austin, TX.
If you're asking if it's possible to get LTE on the T999, I have no idea. ;P The MSM8960 (S4 SoC in both phones) does support it natively but I don't know if it's possible to enable the LTE modem in software. You could try flashing an AT&T modem but I doubt it's that simple.
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Hey I have a question regarding this topic and the quote above. You listed the Apn's with its respective data plan:
1. wap.cingular = non-smartphone (i'll refrain myself from calling it a dumb phone plan lol).
2. Phone = 4G/H+
3. LTE = PTA
So I've just switched over from IPhone 4s > HTC One X > to now the Samsung Galaxy S3 (International unlocked version).
When I switched sims from iphone to one x, my data wouldnt work so they told me to get an LTE sim and give them the imei # of the ONE x. So i did that and everything was fine. They updated my account and i was receiving LTE on the phone with no issues.
NOW, with my galaxy, i just stuck the LTE sim in the phone and the phone defaulted to the cingular 410 apn. This is same as wap.cingular.
So here are my questions:
1. Would it be beneficial (from a performance/data speed standpoint) for me to call AT&T and tell them I'm back to a NON-LTE phone and have them change my account to a non-LTE account? And go through the process of changing my imei # in their system again also?
2. Since I'm actually on a smartphone unlimited (i did not take advantage of the $10/mo medianet) should I change my APN settings to "PHONE" and not use what the S3 defaulted me to?
3. Whats the actual difference in using wap vs phone APN's... I know the settings themselves are different, but anybody know the technical differences?
Thanks so much in advance!

T-mobile galaxy S3 on ATT 4G network
Hello can anyone post pics of the Galaxy S3 (T999) the t mobile version on ATT 3g or 4g networks. I am thinking about buying it but wanna be sure that it works before i spend the big bucks

This guy confirmed it works:
http://forum.xda-developers.com/showpost.php?p=27984139&postcount=28
Anyone else have such luck?

I'm having this exact problem. I have an unlocked T Mobile S3 that I want to use on the AT&T network. Phone, text and VM work fine although AT&T hasn't figured out how to give me data service in any form. They're all stumped by this.
What I really need help with is coaching AT&T through the process.

Need help on Tmobile

Got my zl today excited then let down by problems with internet, so i insert sim and it picks up tmobile and auto download settings then when it start downloading google play apps it hangs. I go to chrome loop up a page get "error 502 bad request the server could not resolve your request", i have full bars and H+ but wont connect. I also notice that when i insert the sim i can just pull it out with out pressing down on it. Any help...
UPDATE: Got it working just need to tweak the APN settings, for future tmobile user the automatic download setting are not correct here is the link for Tmobile settings http://support.t-mobile.com/docs/DOC-1979

Cool. I was using tue ones from the Somy app...
Skickat från min Nexus 4

T-Mobile
I know the ZL (6506) is capable of working with T-Mobile's new LTE network, but my question concerns the IMEI number and your account with T-Mobile. On AT&T, your account has to have an IMEI number that is known and recognized by AT&T so as to enable LTE connectivity. Is this also the case with T-Mobile??

dunnsantee said:
I know the ZL (6506) is capable of working with T-Mobile's new LTE network, but my question concerns the IMEI number and your account with T-Mobile. On AT&T, your account has to have an IMEI number that is known and recognized by AT&T so as to enable LTE connectivity. Is this also the case with T-Mobile??
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The info or where you got your info is incorrect. you DONT have to have a IMEI number that is known to AT&T to have LTE. I have changed phones prob 20 times since I got my first LTE phone and NEVER had to change it again.
You can be on the LTE data plan and everything work fine on a old dumb edge phone then put the sim card back in an LTE device and it still work fine...
LTE worked fine on a Canda Note 2 and One X

Same here. TMo does not care. I just started using my ZL teo days ago, before that was Nexus 4. Just took the SIM from the N4 and inserted in the ZL. All works!
Skickat från min Nexus 4

Hey people, I'm seriously considering picking up a Sony Xperia ZL C6502 Black. I'm aware that it doesnt support LTE on either network, but the price is insanely lowwww! My question is, does anyone know what kind of speeds I can expect to see on TMO and ATT respectively? I'm currently using an ATT Gnote 2 on ST/ATT and I have a Nexus 4 as a backup which I use on the TMO $30/"unlimited" data plan. I only point this out to indicate that I don't get LTE speeds now, which sorta makes it a "You can't miss what you never had" type of deal. I roughly get about 14-17mbs down on either device. Is there any chance I'd enjoy the same with the 6502 on either of these plans??? Any help/insight or even opinions, would be greatly appreciated.

The speeds to expect will be the same as you have now.......
Sent from my C6502 using xda premium

cheapshot789 said:
Got my zl today excited then let down by problems with internet, so i insert sim and it picks up tmobile and auto download settings then when it start downloading google play apps it hangs. I go to chrome loop up a page get "error 502 bad request the server could not resolve your request", i have full bars and H+ but wont connect. I also notice that when i insert the sim i can just pull it out with out pressing down on it. Any help...
UPDATE: Got it working just need to tweak the APN settings, for future tmobile user the automatic download setting are not correct here is the link for Tmobile settings
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Click to collapse
i just received my ZL C6502 today and noticed that the data connection does not work at all. i followed the APN settings on the t-mobile link you gave and still no dice (it does show full bars and H+ as you mentioned and when i switch the SIM to my old G2X its on full HSPA+ speed). i left the house and it was running ok suddenly and streamed netflix, etc. but when i went home it lost the connection again. I'm suspecting that this phone does not really work on t-mo's 1700 AWS even though the box says so and that i only got online outside the house because that area is on the 1900mhz refarm. is there any difference to t-mo's AWS 1700 and regular HSPA 1700mhz?! any insight or help is appreciated!!

I have a 6506 on TMo so I am limited in help. However, someone in my office has a 6502 on TMo and it is working fine. He had trouble until he manually set it. Same case as mine.
Perhaps you have a defective unit? Try removing and reinserting the SIM card. Perhaps a factory reset.
I had mine for almost a month and has been flawless in LTE when in DC and HSPA in Dallas.
Sendt fra min ZL 6506

The 6502 is the same as 6506 but without lte it should work I don't have 1900 coverage and I'm always on hspa and there's no lte were I'm at either. U need to make sure the apn is set exactly there should not be any values under proxy and port also under apn type have it blank that was the issue with mine those three things had values and was messing up internet. Also there's three different apn you have use. 1. Fast.tmobile.com (Lte), 2. Epc.tmobile.com, 3. Internet2.voicestream.com. Give it a try.
Sent from my C6506 using xda app-developers app

thanks for the help guys. ive gathered all that info earlier and did try the three APNs different combinations / proxy - no proxy, etc to no avail. i'm leaning on faulty hardware or messed up radio. i'll just sleep over it but so far its been disappointing :crying: great phone though...

As a quick update I did literally sleep over it and I'm happily up and running with hspa.. I literally left the phone alone overnight lol. Rooted the fone and all I need is to figure out how to get to recovery to put CWM since pressing vol up at boot is not working and flashboot isnt going either (that's for another post). Moody bastard this ZL is.. Anyway Thanks again!
Sent from my C6502 using xda premium

I have a 6506 on TMo without any issues. I live in LA without TMo LTE, but speeds have been as high as 18Mbps in West LA. I only have the issues of bad coverage at my house, but that's just TMo and not the phone.

hyelton said:
The info or where you got your info is incorrect. you DONT have to have a IMEI number that is known to AT&T to have LTE. I have changed phones prob 20 times since I got my first LTE phone and NEVER had to change it again.
You can be on the LTE data plan and everything work fine on a old dumb edge phone then put the sim card back in an LTE device and it still work fine...
LTE worked fine on a Canda Note 2 and One X
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That's the thing you had an LTE phone AT&T had in their system when your account was provisioned for LTE so you never had a problem after that. For those people that have the ZL as their first LTE phone on AT&T they will have to first get the account setup for LTE using a phone AT&T recognizes on their network.
So basically put the SIM in an AT&T LTE phone, have AT&T provision it for LTE then once that's done you can put it in any other LTE phone and it will work fine
Sent from my Sony Xperia™ Z

Anyone using this phone on ATT

I understand that this phone has the same hardware and supports the ATT LTE bands. I am done with locked bootloaders, I need confirmation someone is using this phone on ATT Network w LTE successfully without any hacks..
Any other feedback will be great (call quality, radio performance on ATT network)
Seriously pondering getting the T-MO version. I am hoping I can get one off contract.
TIA

I am currently using the phone on at&t. LTE works. Just make sure you set your APN right. I just disabled WiFi calling because it is not supported.
Sent from my SGH-M919 using xda app-developers app

Yes I am. I had to add the apn and then choose lte in the network section. Works great though.
Sent from my HTC One using Tapatalk 2

Same here. Rooted, unlocked and running very smoothly, no lag at all.
Just need to get a case for it.
Sent from my SGH-M919 using Tapatalk 2

what is the apn setting bc im looking to switch to t mobile with the s3 att

I am NOT able to get this to work at all on mine. I am unlocked, rooted and I am using a red pocket sim that uses AT&T towers.
Any suggestions?

Did you get an unlock code from tmo, a 3rd party, or some sort of debug method a la s3 and note 2?

muqali said:
Did you get an unlock code from tmo, a 3rd party, or some sort of debug method a la s3 and note 2?
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Click to collapse
I'm considering buying the TMO variant to use on AT&T as well and I have a few questions related to this topic:
Would service reception be restricted to just LTE or can the T-Mobile S4 still receive AT&T's E, 3G, etc as well when used on AT&T's network?
Also, and I'm sure this is dependent on the answer to my first question, would the T-Mobile S4 work with the AT&T 3G Microcell?

Whos Lte is faster tmobiles or att.
Sent from my SGH-M919 using xda app-developers app

rp56 said:
Whos Lte is faster tmobiles or att.
Sent from my SGH-M919 using xda app-developers app
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hard to answer; it really depends on the area, but for the most part im pretty confident in saying t-mobiles LTE is faster.
see attached photo

I've been using the T-Mobile version on AT&T for a few days. I unlocked using the debug menu instructions in this forum, setup the AT&T LTE APN and set the preferred network to LTE. It works fine on LTE, hspa, etc.
Speed test results were 53Mb down, 19Mb up, 66ms ping in Raleigh, NC.
I gave away my microcell with my POS iPhone because the Samsung phones performed OK without it. So, I can't answer whether the T-Mobile version will work correctly with a microcell.
Sent from my SGH-M919 using Tapatalk 2

Help please...
Hi all,
I have a Galaxy S4 I9500, I keep my brightness at full all the time. When I finish playing games even "subway surfer" for 10 minutes, and exit to the desktop, I find that brightness is lowered alittle bit & increase gradually to the previous state which is full brightness (from 5 to 10 seconds). Could this be a result of that when playing games, the device uses the 1.6 quad core CPU and upon exit it takes alittle time (those 5 to 10 seconds) to shift to the 1.2 quad core CPU?
Really need your help.
Thanks alot.

So it seems this is the perfect phone to use on AT&T due to all that bootloader problems and crap on the AT&T version.

So folks still running fine without issues with this device on AT&T's network? I know LTE bands over lap so those are fine and the specs for the other frequencies all line up too but any problems with any data or voice stuff at this point after more time has passed? Including text and media messaging?

Screwbal said:
So folks still running fine without issues with this device on AT&T's network? I know LTE bands over lap so those are fine and the specs for the other frequencies all line up too but any problems with any data or voice stuff at this point after more time has passed? Including text and media messaging?
Click to expand...
Click to collapse
I had left an area with LTE coverage before I was able to network unlock, so I can't comment as to how LTE is working... but I've had no problems using it on Edge or 3G, texting/mms, etc. It even works flawlessly on my Microcell with no modifications other than the network unlock.

mohan_kr said:
I understand that this phone has the same hardware and supports the ATT LTE bands. I am done with locked bootloaders, I need confirmation someone is using this phone on ATT Network w LTE successfully without any hacks..
Any other feedback will be great (call quality, radio performance on ATT network)
Seriously pondering getting the T-MO version. I am hoping I can get one off contract.
TIA
Click to expand...
Click to collapse
Mohan,
Which phone are you getting? The T-mobile version or the Google S4? I read online that the Google version of S4 is the same as the T-mobile version. I'm a T-mobile customer but I want to follow you using the Embryo rom on your new phone selection and hopefully get wifi-calling feature. I'm currently using the Embryo rom on my T989. Thanks.

adding an APN ... issues
lemme ask what will undoubtedly be a noob question. i've unlocked my T-Mo S4. confirmed. i popped in my AT&T iPhone 5's SIM card and boot up. i see that i have a signal, am able to make and receive phone calls. but no data. when i look at the APN, i'm seeing Cingular APN. what gives? i thought the phone would auto-detect and attach to the correct APN and i'd be good-to-go. thoughts? do i need to manually add the APN? I have all of the info necessary. when i try to add the APN, i am able to get to the proper menu, add all of the info. however, when i try to "save" the info, it never shows up as an APN for me to select. so whatever info i've just entered was never saved.
help!

ATT note 2 as go phone

I have a att note 2 with a go phone sim card in it. I get hsdpa+ but can not get lte. When the sim card was bought it was used in a vzw note 2 would that effect it cause the vzw note 2 imei number was used to activate the sim. All the ready I have done someone said somewhere that the sim is probably not provisioned for lte. Well the point im getting at is I need help in trying to get lte and I know where im at there is lte cause my Co workers are currently on lte.
Sent from my SAMSUNG-SGH-I317 using Tapatalk

H+ is LTE. Check the phone status >> mobile network type and you will see you are connected to fastest available network.

mjohnson4580 said:
I have a att note 2 with a go phone sim card in it. I get hsdpa+ but can not get lte. When the sim card was bought it was used in a vzw note 2 would that effect it cause the vzw note 2 imei number was used to activate the sim. All the ready I have done someone said somewhere that the sim is probably not provisioned for lte. Well the point im getting at is I need help in trying to get lte and I know where im at there is lte cause my Co workers are currently on lte.
Sent from my SAMSUNG-SGH-I317 using Tapatalk
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If you are on a go-phone plan I would be very careful using mobile data. My wife doesn't use her phone much so she has a go-phone plan. I experimented with it some and a couple of apps got updated via mobile and it ate her $$ up in a hurry -- something to the tune of $17 in just a couple of minutes.
Then again there are a couple of different go-phone plans so this might not be the case for yours.

rangercaptain said:
H+ is LTE. Check the phone status >> mobile network type and you will see you are connected to fastest available network.
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Click to collapse
Sorry but h+ is not lte. And according to documents on att.com and other varies websites you can connect to lte with this phone on go phone plans

It is LTE if the rom doesn't have an LTE icon.
And how do you know you are in an LTE area? I'm in a large California city, and I almost never see the LTE icon.

HSPA+ is considered "4G" by ATT, but it is not 4G LTE.

AT&T 4g icon... yaya
At&t stock roms will show 4g icon in the status bar for both HSPA+ and LTE. This is where the confusion starts yay AT&T.
To check to see if you are on LTE I would go to settings / about phone / Status and check the mobile network type. I think this will give you a better indication of the network you are on.
An information app similar to https://play.google.com/store/apps/details?id=gdip.android.network may also help.
If you are still not getting LTE with your at&t go phone I would start by checking your apn settings.
I have used a few of at&t mvno's I have had straight talk, at&t-go, and currently prefer(and use) AIO wireless (now re-branded to Cricket). All of at&t mvno's don't even require you to unlock your carrier you can use any at&t phone on their networks.
I hope this clears things up a bit.

I've checked apn settings they are what it should be and in the settings menu it reads hspa+. And where I live and work both have lte. Gettysburg pa is where I live and I work in baltimore,md and people I know all have lte. I called customer service and they could see I was in a lte area and only receiving hspa+. They have a trouble ticket in. I know the icon in the notification bar always shows 4g thats why Ilike to always go off setting/about. Thank you for your help
Sent from my SAMSUNG-SGH-I317 using Tapatalk

you need a new sim, you can get LTE with at&t prepaid but if you have an older sim,it wont work. i had a note 1 on postpaid and was only getting h+ until i went to the at&t store and got a newer sim.
some people will try to say there is no lte on at&t prepaid,there is.

Joshua79 said:
At&t stock roms will show 4g icon in the status bar for both HSPA+ and LTE. This is where the confusion starts yay AT&T.
To check to see if you are on LTE I would go to settings / about phone / Status and check the mobile network type. I think this will give you a better indication of the network you are on.
An information app similar to https://play.google.com/store/apps/details?id=gdip.android.network may also help.
If you are still not getting LTE with your at&t go phone I would start by checking your apn settings.
I have used a few of at&t mvno's I have had straight talk, at&t-go, and currently prefer(and use) AIO wireless (now re-branded to Cricket). All of at&t mvno's don't even require you to unlock your carrier you can use any at&t phone on their networks.
I hope this clears things up a bit.
Click to expand...
Click to collapse
My ATT Note 2 has a 4G icon and a 4G LTE icon...
Sent from my SAMSUNG-SGH-I317 using Tapatalk

I agree with getting a new sim. Go to a corporate/retail store not a dealer/franchise store, as the corporate will give you a new reprovisioned sim and the dealer will say it won't matter, or charge you.
I just saw the LTE icon for the first time, but I am far away from my home now.

Tmobile S6 edge on AT&t users......

I currently am using my unlocked tmobile S6 edge on AT&T and was curious I am not getting an lte signal icon on my phone just showing 4G. Could someone confirm they are getting an lte symbol icon to show or will the symbol just show 4G on my tmobile even if it's on att lte? If someone is getting a lte icon to show could you tell me your apn settings that you are using? Thanks!

If you havent had lte before on at&t, you might need to get your account updated to use lte. Call at&t and try to have them provision your account for lte. The first rep i talked to said they cant provision for lte because i dont have an at&t phone so you might need to try another rep. I'm using the default setting for nxtgenfone and see the lte icon.
Sent from my SM-G925T

As above, you need to call. However, I was lead 20 different ways before getting it fixed. Basically, the IMEI forthe Tmo version is identified as a phone with no LTE in their system. So, you don't get LTE signal when using the nextgenphone APN. You actually won't get any data. However, if you switch it to the phone APN, you will get 4G. You can verify this by moving your sim into another LTE capable phone and it does the same.
When I spoke to the rep, she said she wasn't able to enable the LTE plan based on the IMEI. I had to give her the IMEI of my Nexus 6, which allowed them to select the proper plan. Once that was done, I put the SIM back in the Edge, selected the nextgenphone APN, and now I have LTE.