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.

Unlocking T-Mobile for AT&T service

hi everyone:
I have been looking via numerous thread online on many Android forums especially here and have been unsuccessful for the past 2 days now. So I figured I would need to create a thread and finally give in and ask for some help. I have a T-Mobile Samsung Galaxy 3 phone and I need to unlock it so that it will work on my AT&T service. Now i understand about rooting the phone and being able to play with themes etc, but its not that great if I can't use the phone itself.
Now without coming up with some kind of answer I must have watched about 40 youtube video's hoping to find out some kind of information. Mostly what I got out of it was numerous website that offer unlocking for phones at a certain price.
unlockcodesource(.)com
unlock2go(.)com
mobileunlockcodes(.)co.uk
Has anyone ever used any of these website or can someone give me some good advise on how I can get this phone unlocked please/
~Aqua

I think the toolkit stickied in the development forum has an option to SIM unlock the GS3. I have not tried this, and do not know if it works, but if the option is there, you might want to give it a shot.

If you're on contract with t mobile and your account is in good standing with them. Call them tell them you're going over seas and need to unlock your phone so you can use it. They will send you unlock code ... then pop in an att sim card and it will prompt you to enter the unlock code t Mobil gave you. Done
Sent from my SGH-T999 using xda premium

thanks _
Crisisx1 said:
If you're on contract with t mobile and your account is in good standing with them. Call them tell them you're going over seas and need to unlock your phone so you can use it. They will send you unlock code ... then pop in an att sim card and it will prompt you to enter the unlock code t Mobil gave you. Done
Sent from my SGH-T999 using xda premium
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OK thank you. I followed your instructions and they said it would take up to maybe 24 hrs for the phone to be unlocked. If it isn't unlocked than she said to call back with the conformation number she gave me. If that doesn't work than they would have to give Samsung my info and could take up to 14 days. She said when you buy phones almost all stands and corp stores have already unlocked phones.
she also said it would be auto unlocked for good. Can they lock the phone back up once it is be unlocked?
~Aqua
edited: Once I have it unlocked ( if all goes good ) do i use the same APN settings that I needed to put into the phone in order for my phone to work on the AT&T network as I did with my S2 that I got unlocked ?

Don't they use different frequencies for HSPA+
You would be relegated to edge speeds, correct me if I'm wrong

speed issue
five40 said:
Don't they use different frequencies for HSPA+
You would be relegated to edge speeds, correct me if I'm wrong
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I really don't know. That would be a great question if someone would be nice enough to help me with this information? Again i have a T mobile S3 hopefully its unlocked would I be losing speeds by being on the AT&T network?
thanks
~Aqua

AquaWater said:
I really don't know. That would be a great question if someone would be nice enough to help me with this information? Again i have a T mobile S3 hopefully its unlocked would I be losing speeds by being on the AT&T network?
thanks
~Aqua
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Click to collapse
The T-Mobile S3 has the 850/1900 3G bands so it will work on AT&T's 3G network. It will not get LTE though.
You can unlock either by paying for a code from the various resellers online or requesting an unlock code from T-Mobile if you have an account in good standing with them. If you can't get the code from T-Mobile I suggest searching 'T999 unlock' on eBay and you'll find some good options.

The tmobile galaxy s3 will work on the ATnT HSPA+21 frequency. Same frequency the International version runs on for that network.
Sent from my SGH-T999 using xda app-developers app

Edge network and 3/4G Question
I found an excellent place so far on eBay for buying unlock codes. they have almost 3800 sells with a 99% positive feedback. Great customer service. The guy answered numerous questions of mine and made sure i did everything correctly. Payment was $24.95 US, so hopefullly everything will go good.
He was talking about being on something called an " Edge " network which is a little slower, but he said you won't notice a difference between your unlocked S2 and the unlocked S3 now. Right now my S2 says I have 3G service when I use it. I dont understand how i had a inspire4G, what is the 4G for if AT&T only gives you 3G service? And where I am in United States I should have 4G service no matter what. I'm confused on that.,

AquaWater said:
I found an excellent place so far on eBay for buying unlock codes. they have almost 3800 sells with a 99% positive feedback. Great customer service. The guy answered numerous questions of mine and made sure i did everything correctly. Payment was $24.95 US, so hopefullly everything will go good.
He was talking about being on something called an " Edge " network which is a little slower, but he said you won't notice a difference between your unlocked S2 and the unlocked S3 now. Right now my S2 says I have 3G service when I use it. I dont understand how i had a inspire4G, what is the 4G for if AT&T only gives you 3G service? And where I am in United States I should have 4G service no matter what. I'm confused on that.,
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Edge is 2G speeds, which are substantially slower than 3G speeds. IMHO, 3G speeds are livable, 2G/Edge is not.
Different phones have different radios which work on different frequencies. Some phones are not compatible with other services at all, and some will work on other carriers but often not at optimal speeds.

Darmokk said:
Edge is 2G speeds, which are substantially slower than 3G speeds. IMHO, 3G speeds are livable, 2G/Edge is not.
Different phones have different radios which work on different frequencies. Some phones are not compatible with other services at all, and some will work on other carriers but often not at optimal speeds.
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So than why would someone suggest that I would get "edge" instead of what i have now? I'm getting 3G now with my T-Mobile S2 unlocked on AT&T, but now I'm going to have an unlocked S3, why wouldn't it be the same?

Because the radios in the devices are different.
Sent from my SGH-T999 using xda app-developers app

So than why would someone suggest that I would get "edge" instead of what i have now?
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Click to collapse
Because he/she doesn't know what he/she is talking about. You will be fine with a T-Mobile S3 on AT&T.

That's what I said earlier in not so many words.
Voice willl work fine you will not see HSPA+ speeds on At&t with a T-Mobile Galaxy SIII.
If the T-Mobile SIII has the hardware capability to support the At&t HSPA+ bands you would need modified radio software to unlock this ability.
I believe this was done on the Galaxy Note to tun on T-Mobile HSPA+ network before it was officially launched on T-Mobile.
kmdub I believe your the one that's wrong.

five40 said:
That's what I said earlier in not so many words.
Voice willl work fine you will not see HSPA+ speeds on At&t with a T-Mobile Galaxy SIII.
If the T-Mobile SIII has the hardware capability to support the At&t HSPA+ bands you would need modified radio software to unlock this ability.
I believe this was done on the Galaxy Note to tun on T-Mobile HSPA+ network before it was officially launched on T-Mobile.
kmdub I believe your the one that's wrong.
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Click to collapse
I unlocked my t999 and am using an att straight talk sim getting HSPA speeds. Going to switch back to tmobile prepay because it is way faster than att HSPA with better latency. Although coverage may be lacking, i may just switch to an att ST sim.
To answer your question, a Tmobile S3 will work on ATT HSPA+ network with the HSPA+ Speeds of up to 6-7mbps in NYC area. The average I've been getting is around 2-3.5 mbps. With the tmobile prepay sim I have, it's usually around 2-18mbps down in NYC area.
The T-mobile S3 will not work on the ATT LTE network because it lacks that radio (or so they say for now); there have been other threads suspecting it's just a matter of flashing the right radio to "turn on" the ATT LTE radio. However, if all you want is HSPA+ speeds, rest assured it will work fine.
The ATT S3 is lacking the AWS bands for TMobile so it will not get the HSPA+ on Tmobile.
Best regards.

radio issue
First off, I would like to thank everyone who has been helping me along with my issues with my phone. I appreciate it a lot and I'm picking up more knowledge more and more everyday from you guys and reading heavily on the forums.
if the hardware in the phone doesn't support HSPA+ 1) will i have to root the phone and 2) change the radio? And 3 ) if I change the radio does that mean I would need to install a custom ROM i order for it to work properly?
Also, from one of the post they said "The T-Mobile S3 has the 850/1900 3G bands " - of that is true will than I should be able to have the 3G speeds correct?
I really hope I am not making some people angry, I'm new to this and trying my hardest to understand everything so I don't make mistakes. Please bare with me. Again, thank you so much everyone who has contributed so far. I still have a lot to learn. The reason why is because I just don't want it to work ( I do, want it to work ) but I want to understand why everything is working they way it is and I've over the past almost month have been picking up a lot of knowledge. Can't wait to hear from you guys

kmdub I believe your the one that's wrong.
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Click to collapse
No, actually, you are wrong. The T-Mobile S3 does not need any modification to work properly on AT&T's HSPA network. Seems you are confusing something else with frequency. Quit spreading bad information.
OP: Don't worry about it. Some are making this way more complicated than it needs to be. As said before, if you have the T999, you will be fine on AT&T's HSPA network without any modifications (other than an account...lol). Just get the phone SIM-unlocked, pop in the right SIM, you are good to go. Seriously, it is that easy.

Well there it is, I stand corrected!
I had no idea the T-Mobile SIII supports At&t HSPA+ bands.
Is the same true to all T-Mobile HSPA+ phones?

Sorry for any issues, just learning
Hi everyone,
thanks so much for the info. Will the S2 I needed to put in certain APN settings inorder to receive MMS ( picture ) via texts. Do i use the same settings for the Samsung Galaxy 3?

kmdub said:
No, actually, you are wrong. The T-Mobile S3 does not need any modification to work properly on AT&T's HSPA network. Seems you are confusing something else with frequency. Quit spreading bad information.
OP: Don't worry about it. Some are making this way more complicated than it needs to be. As said before, if you have the T999, you will be fine on AT&T's HSPA network without any modifications (other than an account...lol). Just get the phone SIM-unlocked, pop in the right SIM, you are good to go. Seriously, it is that easy.
Click to expand...
Click to collapse
I too have learned from this thread

No Data on AT&T for unlocked T-Mobile N2

Hey all, been lurking for a while and found that many of you have unlocked Note 2's running on AT&T. I bought my unlock code and all is well on the voice front, I just can't seem to get data working (not edge, not 3G, not HSPA+, nothing). I've tried the various APN's floating around, I've tried selecting CDMA ALL for the frequency band, and I've selected AT&T and "registered on the network" using the automated feature of the phone itself. Still nothing.
When the AT&T version is released, will I be able to flash the ROM and make it work as if I bought it from them?
Thanks in advance for your help.

Thats weird. I unlocked mine and got tge cingular apn automatically .
Sent from my SGH-T889 using xda app-developers app

Do you have the right sim and have you got at&t to update their system so it can work? Tell them you have a Note 1.
That's what Indie. I have data (but not LTE)
Sent from my SGH-T889 using xda app-developers app

apn's?
ekerbuddyeker said:
Do you have the right sim and have you got at&t to update their system so it can work? Tell them you have a Note 1.
That's what Indie. I have data (but not LTE)
Sent from my SGH-T889 using xda app-developers app
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what are these apn's you speek of fellas?
i am planing on unlocking my note ii and getting it on straight talk att or straight talk hybrid.
so taking sujestions, ideas, would like to get lte working but at least data

ekerbuddyeker said:
Do you have the right sim and have you got at&t to update their system so it can work? Tell them you have a Note 1.
That's what Indie. I have data (but not LTE)
Sent from my SGH-T889 using xda app-developers app
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Click to collapse
This is the answer I needed. Thank you! I ended up going to the AT&T store today. They said that for some reason I didn't have a data plan anymore (weird because I traded my iPhone 5 for this phone! They subsidized it.) They couldn't get my IMEI to work in their system so the saleswoman used her own IMEI to get me going.
I had been to the AT&T Store once before to trade my nanosim for a microsim, but the phone wasn't unlocked at the time so I couldn't test it out. They scanned in my phone but I guess it didn't take. All is well now, I have 4G (but not LTE, but it doesn't matter because I'm moving to a non-LTE city in less than a month).
It works perfectly, I put in the APNs from the Galaxy S3 on display that the AT&T Store. Decent speeds, awesome phone. Thanks everyone!

intopieces said:
This is the answer I needed. Thank you! I ended up going to the AT&T store today. They said that for some reason I didn't have a data plan anymore (weird because I traded my iPhone 5 for this phone! They subsidized it.) They couldn't get my IMEI to work in their system so the saleswoman used her own IMEI to get me going.
I had been to the AT&T Store once before to trade my nanosim for a microsim, but the phone wasn't unlocked at the time so I couldn't test it out. They scanned in my phone but I guess it didn't take. All is well now, I have 4G (but not LTE, but it doesn't matter because I'm moving to a non-LTE city in less than a month).
It works perfectly, I put in the APNs from the Galaxy S3 on display that the AT&T Store. Decent speeds, awesome phone. Thanks everyone!
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I wonder what speed you can get on att 4G network with TMO phone if you have tested, one of my buddy has a international version he gets 3 - 6 when did a speed test

Geet said:
I wonder what speed you can get on att 4G network with TMO phone if you have tested, one of my buddy has a international version he gets 3 - 6 when did a speed test
Click to expand...
Click to collapse
That's what I get. And honestly, 3-6Mb/s is perfectly fine for me. I'd like to get LTE for the time I'm here but it doesn't bother me that I don't. At some point one has to question that value of 100Mb internet on a 3GB data plan.

LTE is locked as of right now on the tmobile GN2

intopieces said:
Hey all, been lurking for a while and found that many of you have unlocked Note 2's running on AT&T. I bought my unlock code and all is well on the voice front, I just can't seem to get data working (not edge, not 3G, not HSPA+, nothing). I've tried the various APN's floating around, I've tried selecting CDMA ALL for the frequency band, and I've selected AT&T and "registered on the network" using the automated feature of the phone itself. Still nothing.
When the AT&T version is released, will I be able to flash the ROM and make it work as if I bought it from them?
Thanks in advance for your help.
Click to expand...
Click to collapse
I know it isn't AT&T but it took a while to get Solavei APN working on my phone. I played with the settings forever with a customer service rep before I finally got it to work. MMS & internet work great now! Can't wait for LTE to launch!

i got my tmo verion unlocked. I purchased a 50/mo at&t go prepaid, and I can see 4G in the status bar.
Hope this helps

Just started a new thread about this...http://forum.xda-developers.com/showthread.php?t=1971879...then I found this one.

Bell i317 LTE APN help?

I just recently bought a locked Rogers Galaxy Note II i317M and unlocked it using cellunlocker(dot)net; however, I am not getting a LTE signal on Bell for some reason — it's always just "4G".
I talked to a rep and he said that it should work since im in a LTE covered area. He also said that he can't help me further since I didn't buy the phone from Bell .
Anyone know what's happening here? Did the unlocking mess it up? Is that even possible?
I'd really appreciate any help. Thanks.

saffant said:
I just recently bought a locked Rogers Galaxy Note II i317M and unlocked it using cellunlocker(dot)net; however, I am not getting a LTE signal on Bell for some reason — it's always just "4G".
I talked to a rep and he said that it should work since im in a LTE covered area. He also said that he can't help me further since I didn't buy the phone from Bell .
Anyone know what's happening here? Did the unlocking mess it up? Is that even possible?
I'd really appreciate any help. Thanks.
Click to expand...
Click to collapse
What are your APN settings?

Bell does not have a different apn for lte and hspa. After flashing some at&t roms, I am not getting lte at all. But the stock room is okay .

I'm on Rogers and couldn't get on LTE. It turned out to be my old SIM. Rogers replaced it and voila, LTE. Not sure if Bell has a similar issue with older SIMs or not, but maybe it's worth a try.

i flashed the Rogers modem. Works now.

Yeah check your apn settings and post them here
Sent from my SGH-I317M using xda premium

lbloo said:
I'm on Rogers and couldn't get on LTE. It turned out to be my old SIM. Rogers replaced it and voila, LTE. Not sure if Bell has a similar issue with older SIMs or not, but maybe it's worth a try.
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Click to collapse
Ya. Its the same with Bell. You need to get an LTE sim card otherwise you'll be stuck with H+
Sent from my SGH-I317M using xda premium

I have a corporate unlimited data plan from a while ago I get hspda+ all the time but never got lte. Im just curious do you need like a specific lte plan or you just receive lte in the coverage area?
Sent from my SGH-I317M using xda premium

iniquity0411 said:
I have a corporate unlimited data plan from a while ago I get hspda+ all the time but never got lte. Im just curious do you need like a specific lte plan or you just receive lte in the coverage area?
Sent from my SGH-I317M using xda premium
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Click to collapse
You don't need an LTE plan on Bell.
Sent from my SGH-I317M using xda premium

Sometimes changing the apn to proxy.bell.ca instead of pda.bell.ca would fix the issue. . Although tried both ways on my SGN2 - both worked out well..
Sent from my SGH-I317M using xda app-developers app

Just called they said I need a compatable data plan and mine currently isnt able to get lte.
How do you change the apn? I found it but its all greyed out
Sent from my SGH-I317M using xda premium

Iniquity0411: all the older UMB, UNPDA and any other unlimited data plans are not eligible for LTE. If you want all the nitty gritty details, you should be able to find relevant posts on HowardForums.

lte not working for me
hi guys i recently flashed miui for my note 2 and noticed im only getting 3g, my APN settings look the same and ive also played around with them but always end up with either no internet or only 3g. any suggestions?

As a canadian multi-carrier cell phone salesman you do need a data plan, sim, and phone all to be lte enabled for lte service. If you are on a plan roughly two years or older you most likely did not get upgraded to lte data. This sounds like your issue here, and you would have to go talk to your corporate to have the plan changed over. I'm not sure if its a personal under a corporate (this case changing should be easy) or a giant bucket plan, in which case good luck.
Rogers is the only canadian carrier to have an lte APN.
and lastly your bell micro sim should clearly be labeled LTE, and for others FYI Telus sim cards should be V31, and rogers I believe its B010 if memory serves me right.
On the note 2 lte is already a default setting if already enabled.

well i guess then miui for the note 2 is not an lte rom because ive checked and rechecked my apn settings, and i have all the above that u mentioned, the stock rom (4.1.1) had lte but when i flashed miui all im getting is 3g.

apn settings all blank i317m
I did something in odin.
I am on 4.3 official firmware but I have no mobile data. I checked my apn settings and virtually all settings are blank. Not set.
Help please
Thanks

[Q] I NEED HELP!! No one can help me so far :(

Group MMS is DELAYED!!! WHY!!
I switched from an iPhone(which was fine) to a Nexus 4 and the Nexus was a disaster.
I figured the Nexus 4 was messed up so I sold it and then got the Note 2. Its T Mobile's version and unlocked.
I changed the APN settings to the LTE one and it hasnt really made a difference. AT&T stated that I'm on the correct LTE plan. I tried GO SMS Pro and it really didnt fix it
The delays are sometimes 3-5 min, sometimes 6-12 hours. Most annoying is that when I try to send a MMS, it gets stuck in the sending phase. Id need to send another MMS to push the one thats not sending. Sucks.
What is going on? Is it Android? Could it be because its not an official AT&T phone(but I heard its technically the same phone). Is there something else I should try?
I give up guys. Can someone plz help?

Friendly bump?
Sent from my GT-N7105 using xda premium

Wow I have no idea friend. No idea. Seems to be an internal issue with the phone maybe the antena? Not sure. Sorry I know this doesnt help.

I could be wrong, but I'm pretty sure the T-mobile Note 2 won't work properly on AT&T because this phone does not support AT&T's LTE band. Similarly, AT&T's Note 2 won't work properly on Tmo's network either.
With that said, the guys over on AT&T's forum have a guide to enable Tmo's band on their phone. Maybe... MAYBE, you can use a similar process to get their band on your phone. ... Then again, I know nothing about that. I just saw the thread and figured it might be beneficial to you.
http://forum.xda-developers.com/showthread.php?t=2068041
Quick question though, Why did you get a Tmo Note 2 if you're on AT&T?

default159: The T-Mobile T889 will work with AT&T on HSPA only, no LTE. No reversible, safe and repeatable procedure has been established to enable LTE on the T889 yet. The AT&T I317 will work on T-Mobile on HSPA when its been refarmed to 1900 MHz, otherwise on EDGE. It will work on AWS HSPA with the mod posted here.
Shockg911: It could be a number of things, but double check your MMSC settings and possible MMC settings versus AT&T CSC files. If you're familiar with Logcat and DDMS, check that out too.