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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Click to collapse
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.

Using T999 on AT&T?

(Did a quick forum search on this and didn't see anything that answered my question, so if this is around somewhere, I apologize.)
Okay, I'm currently with Verizon Wireless, and generally happy with my service, but what I am unhappy with is my bill (I pay $220+ a month for 4 lines, only 2 of which are Smart Phones). I'm thinking of switching to T-Mobile's prepaid service when my contract is up, and my and my wife both like the Galaxy S3, but I'm leery about T-Mobile's service in my area (I live in a rather Rural area). Ideally, I'd buy an unlocked version of the phone to use with prepaid plans (so if I'm dissatisfied with one prepaid service, I just switch out SIM cards and port my number), BUT unfortunately, the unlocked versions of the S3 that I've found don't work with the T-Mobile HSPA+ band (1700 MHz). However, what I have found is that when comparing the T999 with the I747 (T-Mobile and AT&T versions, respectively), I've found that (LTE aside) the frequencies they operate on are exactly the same, with the difference being only that T-Mobile's can use the 1700 MHz frequency.
SO, my question is: If I went ahead and sprung for a couple of T999's and found that T-Mobile didn't work for me, could I just unlock the phone for use with AT&T and pop in an AT&T SIM, and enjoy AT&T's HSPA+ goodness? Or is there something I'm missing? I know that the other way around won't work (only in very, VERY isolated spots will T-Mobile customers with unlocked iPhones and Droids that operate on 1900 MHz frequencies actually get more than EDGE speeds with their devices), but this seems like the best option (barring buying a GSM Galaxy Nexus from the Google PLAY store, which I'm not sure will be available when my contract is up - I hear that there's a new Galaxy Device being cooked up, and I'm not holding my breath for Google to sell it alongside an older Nexus device).
Opinions?
FYI, I'm not worried about LTE right now. As I said, I live in a rural area that's lucky to have 3G. LTE might not EVER make it to my area (AT&T just added 3G to my area in the last year), so HSPA+ (whether 21 Mbps or T-Mobile's 42 Mbps) is plenty fast for me (my Verizon Wireless Xperia PLAY currently pulls down 1.5 Mbps on a good day).
Link to T999: htt p://ww w.gsmarena. com/samsung_galaxy_s_iii_t999-4804.php
Link to I747: htt p://ww w.gsmarena. com/samsung_galaxy_s_iii_i747-4803.php
(Remove spaces. Would have hyperlinked, but as I don't yet have ten posts, that's illegal.)

Wow. It's refreshing to see someone do research before asking a question.
Yes, that would probably be your best bet. You can use the T-999 on AT&T HSPA+ just fine. You can even use it on Medianet's $10 unlimited data I believe since it isn't an AT&T phone. I feel like you will likely end up doing this as T-Mobile prepaid has a smaller coverage footprint than postpaid (or so they claim).
So yes, if you don't care about LTE, this would work just fine for you.

At&t user here. Yeah hspa+ works fine on it. If losing lte isn't an issue for you then go for it.
Sent from my SAMSUNG-SGH-T999 using Tapatalk 2

I was on the same boat as the OP. I bought an unlocked T999 and I am currently using on ATT's network, but through Straight Talk. I still get HSPA speeds w/o the 5GB cap.

Another AT&T user here also using Medianet plan.. Works perfect on hspa+
sent from my AOKP powered s3

Bump. Is there any specific apn settings to get h+. As i have heard straightalk at&t with tmobile s3 only gets edge speeds? Please tell me i was told wrong lol. Thanks

1slow4G said:
Bump. Is there any specific apn settings to get h+. As i have heard straightalk at&t with tmobile s3 only gets edge speeds? Please tell me i was told wrong lol. Thanks
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In a similar situation!
I have the T999 with T-mobile and am moving to Kauai, am there now and the service is worthless. I looked at AT&T's prices for shi*ts and giggles and ugh, no. I just ordered a straight talk AT&T compatible sim from walmart, will need to cut it because everywhere is out of micro sims, and would like to know how successful the T999 is on the AT&T compatible network of straight talk. I seriously feel lost without data to my phone, it hurts.
I have been researching and researching the band frequencies and everything points to that it should work. I just got this phone after my rooted/unlocked SGS4g went into a toilet and then sold on ebay.
lol
BTW long time viewer of XDA, has been successful in unlocking/rooting/flashing the SGS4g and the T999, with a mac I might add which always makes things complicated.
Thanks again

adelynn2006 said:
In a similar situation!
I have the T999 with T-mobile and am moving to Kauai, am there now and the service is worthless. I looked at AT&T's prices for shi*ts and giggles and ugh, no. I just ordered a straight talk AT&T compatible sim from walmart, will need to cut it because everywhere is out of micro sims, and would like to know how successful the T999 is on the AT&T compatible network of straight talk. I seriously feel lost without data to my phone, it hurts.
I have been researching and researching the band frequencies and everything points to that it should work. I just got this phone after my rooted/unlocked SGS4g went into a toilet and then sold on ebay.
lol
BTW long time viewer of XDA, has been successful in unlocking/rooting/flashing the SGS4g and the T999, with a mac I might add which always makes things complicated.
Thanks again
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Click to collapse
I have my t999 unlocked and with straighttalk at&t sim. I am getting 4g symbol which is hspa+ on at&t terms. Speed is great, loads up browser pages faster than my wifes tmobile and hers is on 4g aswell. Couldn't be happier. But at home and at work I have wifi so i try to avoid using too much data to avoid the infamous data cap
Sent from my Galaxy S3 using neighbors wifi

[Q] Straight Talk - At&T vs T-mobile Questions

Hi all I have a few questions I am hoping someone can answer. I currently have a At&T i717 Note I am using on Straight Talk with a AT&T sim card.
I am getting ok speeds with it and good indoor building coverage. It is unlocked and I had been using it on contract with T-mobile with much better speeds but I couldn't use it at work being in a concrete hospital low building permeability. I am now trying to decide which Note II to buy that will work for me best.
My questions are as follows:
1. Does the Note II use mini sim, or nano sim like the iphone or normal size like the Note i717. Currently Straight Talk only offers mini sim cards for At&t coverage map and not T-mobile (yet I am contacting them to see if they are planning on offering this).
2. Is it difficult to cut down a sim to be the correct size for the Note II if I do want to buy the T-mobile Note II and use it on Straight Talk (faster speeds in my area).
3. Will the AT&T Note II have the ability to be unlocked and used on HSPA+ on Tmobile with flash of different modems like the Note I was modded to do (or without modding)? Or are the radios/modems already compatible on both At&T and Tmobile HSPA+ networks.
I am kinda confused and unsure of what I should do. I want to sell my Note i717 and use the money for Note II but don't want to make the wrong decision between the two options I have listed. I may end up going back on contract with Tmobile with a family member but I would like not to.
4. One more question not specific to the Note but does anyone have any input on credit checks and down payments for AT&T, I have poor credit from when I was younger and made some stupid financial decisions but my job offers 22% discount for AT&T plans which it would be nice for me to take advantage of being able to then use LTE. It would be a $50 on Straight Talk vs. $75 on AT&T (LTE). I probably would be willing to pay the extra $25 a month if I don't have some outrageous down payment. I will check with AT&T directly when I can but was looking for any input from fellow Note II lovers.
Thanks in advance for any help!
IMPIMMS (AMANDA)

I am currently using the unlocked note 2 on straight talk. I tried to cut down my regular sim ti micro but I failed. So I ordered a new micro sim from straight talk. Speeds are good as is coverage. Average about 6mbps+ Sadly I dont know the answers to your other questions.....hope this helped!
Sent from my GT-N7100 using xda premium
---------- Post added at 06:45 AM ---------- Previous post was at 06:44 AM ----------
Also ypu can get a sim cutter on ebay pretty cheap.
Sent from my GT-N7100 using xda premium

Don't use T-Mobile
I recently signed up for Straight Talk. Since my phone was an unlocked T-Mobile phone, I ordered a Straight Talk SIM. My service is horrible. I rarely get 3G, mostly edge. Even the cell service is poor. I have put a non Straight Talk AT&T SIM in my phone and get a constant 3G. So I have ordered a Straight Talk AT&T SIM; will start using the first of November. Hopefully the bad service I have received is the T-Mobile SIM and not Straight Talk.

Just a heads up I was using my note on straight talk and I wanted to use the SIM in my note 2. The people at my local T-Mobile store were nice enough to cut the SIM for me even though I was not using their service. A lot of their stores have SIM cutters for people who are trying to run iPhones on their network.
Sent from my GT-N7100 using xda app-developers app

Edge
purplepizza said:
I recently signed up for Straight Talk. Since my phone was an unlocked T-Mobile phone, I ordered a Straight Talk SIM. My service is horrible. I rarely get 3G, mostly edge. Even the cell service is poor. I have put a non Straight Talk AT&T SIM in my phone and get a constant 3G. So I have ordered a Straight Talk AT&T SIM; will start using the first of November. Hopefully the bad service I have received is the T-Mobile SIM and not Straight Talk.
Click to expand...
Click to collapse
Thats because the unlocked international verion of the phone will only work on the HSPA+ that ATT and Stright talk both have. Consider yourself lucky to see a 3g Signal if your on Tmobile because from my understanding it only works on EDGE with Tmobile:highfive:

purplepizza said:
I recently signed up for Straight Talk. Since my phone was an unlocked T-Mobile phone, I ordered a Straight Talk SIM. My service is horrible. I rarely get 3G, mostly edge. Even the cell service is poor. I have put a non Straight Talk AT&T SIM in my phone and get a constant 3G. So I have ordered a Straight Talk AT&T SIM; will start using the first of November. Hopefully the bad service I have received is the T-Mobile SIM and not Straight Talk.
Click to expand...
Click to collapse
It has been posted all over this forum that the international version of the Note 2, if used on T-Mo will only get Edge data in 99% of the nation. The only places where you will see 3G or H+ is in those areas where T-Mobile has already refarmed its 1900 MHz spectrum (because that's the band that the international Note 2 has). I have heard some parts of Washington state, Las Vegas, Chicago and NYC have it.
But if the OP buys the T-Mobile variant, he would be able to get H+ at very good speeds (depending on where he is).

I'm kinda in the same predicament as the OP... I'm using an original at&t note with an At&t straight talk sim card. I would love to go down to tmobile tomorrow and pick up a Note 2 .. unlock it and throw my sim in it.. but will it work? I can wait till Nov. 9th for the At&t version but if they will work the same I'd like to jump on it now.

Does LTE work
I heard it works with Att LTE is that true can anyone confirm?

Ive heard the note 2 for tmobile is the exact same hardware as the at&t. Not sure how accurate this is, i got that from tmonews. So the tmobile variant also has lte support but is disabled i believe.
That being said, if they are the same harfware with just different model#s to identify the carrier, i would think the at&t version should also have hspa compatible with tmobile, but might just be disabled. Again, this is based on what i read in tmonews.com regarding the tmobile version.
Hope this helps

Hey guys,
Not trying to hi-jack this thread but I have a similar question:
I had Windows Phone on the ATT network. I switched to Straight Talk a month ago by just switching out the sim cards. The phone & service worked great except straight talk does not support windows phone because you can't edit the APN setting in Windows Phone because they are automatic. It was time for a new phone anyways so I went on ebay and found a new phone unlocked on the T-mobile network. I put the straight talk sim in the new phone and now I am getting a lot of problems with sending & recieving text etc. The major problem I have is I keep getting a text message that says +1121611611 (2288 Error Invalid Number, Please resend using a valid 10 digit mobile number or valid short code. This is continuous day & night and will not stop and runs my battery down. Is it possible that I can't use a T-mobile phone with a AT&T version Straight Talk sim?

Techngro said:
It has been posted all over this forum that the international version of the Note 2, if used on T-Mo will only get Edge data in 99% of the nation. The only places where you will see 3G or H+ is in those areas where T-Mobile has already refarmed its 1900 MHz spectrum (because that's the band that the international Note 2 has). I have heard some parts of Washington state, Las Vegas, Chicago and NYC have it.
.
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Click to collapse
Well that explains why I see 3G in Seattle.

I plan on switching to straight talk in April I want to get a note 2 but I have 4 problems
1. Which company will offer the best service ATT or TM?
2. If I get ($$$) Phone is there a way to get insurance/Warranty that will cover me it in case ANYTHING happens? Would Square Trade Do it?
3. Will all the features work?
4. Which sim card should I get ATT, Straight talk or Tmobile?

spawn1980 said:
I plan on switching to straight talk in April I want to get a note 2 but I have 4 problems
1. Which company will offer the best service ATT or TM?
2. If I get ($$$) Phone is there a way to get insurance/Warranty that will cover me it in case ANYTHING happens? Would Square Trade Do it?
3. Will all the features work?
4. Which sim card should I get ATT, Straight talk or Tmobile?
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Click to collapse
First off, why dig up this old thread to post in, it's last post was in October. But I do have to thank you because you obviously did search first.
TMobile is out of the question if you are looking to buy an international Note2 (N7100). You will be only able to use 2G on it unless you are in one of a handful of cities. So if you want to use TMobile, your best option is to buy a TMobile version of the Note2.
As for if you should use TMobile or ATT, no one can answer that for you. You have to talk to people in your area about how their service is, dropped calls and data speeds. As a general rule ATT has better nationwide coverage but there are many places where TMobile has great service and data speeds too.
Insureance, how many times have you dropped your phone in the last year? I put a TPU case on my Note1 and dropped many times and never had it break but some people have them break on the first drop. Up to you, I think it's waste money.

Would love to know if the att note 2 will get lte if on straight talk
Sent from my SCH-I605 using Tapatalk 2

tmobile note 2 contract is up, can I go no contract with it?
I have a note 2 that I got when I was still under contract, im curious if I can go monthly no contract and still use it. Probably through t mobile still until something better comes along, so I don't have to be locked in a contract. Because it sucked.

I have Note 2 N7100. International unlocked version bought from Newegg in Nov of 2012. I have used Straighttalk (AT&T SIM) the whole time. I have had them cut off my data twice so far because of TOS. Says you cant stream music/video, use P2P, and other crap. Basicly they say you can only browse. But let me be clear, I was using 5GB+ each time they cut me off so yea, it was my fault, I know what unlimited means and it's unlimited. Each month they cut it off, I got it turned back on no issues. Now for the last month, my speed has bee HORRIBLE all month. I have used under 500MB thus far but its bad. My wife, who has Nexus 4 and uses a concistant 500MB - 1GB/month and has her ST account totally seperate has the same issue. So does my neighbor and two co-workers, we are getting horrible speeds for the past month or so. So I am seriously concidering AT&T thier ungoddly bounty for service starting next month. I get a discount at work so it equals out to about $70/month, same as the others. I loved ST but it's gotten really bad...
BTW, I bought a TM SIM from TM last week and it was 2G from work to home. I live in Birmingham AL. there is a few miles of good 3G on the interstate but thats it. Hope this helps

Straight Talk has lost out on AT&T for whatever reason(s). They don't offer the AT&T Sims on their site anymore. There are some left on eBay but the sellers have doubled the price or more. The day is supposedly coming that new AT&T Straight Talk Sims will no longer activate. ST has also downgraded the unlimited data on AT&T to 1.5 GB a month. Tmobile sucks in my area. I hope to never have to use it again.

sholsten said:
Straight Talk has lost out on AT&T for whatever reason(s). They don't offer the AT&T Sims on their site anymore. There are some left on eBay but the sellers have doubled the price or more. The day is supposedly coming that new AT&T Straight Talk Sims will no longer activate. ST has also downgraded the unlimited data on AT&T to 1.5 GB a month. Tmobile sucks in my area. I hope to never have to use it again.
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Where is your source that it is only 1.5 gigabytes with AT&T now
Sent from my SCH-I605 using Tapatalk 2

Here's one
http://androidheadlines.com/2013/02/straight-talks-unlimited-data-not-so-unlimited-anymore.html

so i recently just moved from boston to ohio (44820 zip) while i was in boston i used tmobile. however when i came to ohio i noticed i was always using 2g via att. tmobile has no service in this town. so heres my dilemma...i signed up with sprint and to be honest im (no 4g lte and 3g sucks) wanting to dump them. honestly i will pay the etf for both phones (note 2 and optimus g). i just want out!
so im trying to decide what to do...is straight talk or net 10 the way to go? do they both use att or tmobile. i have searched but if i understand correctly att runs net 10 and straight talk runs tmobile. but do they roam on each other?
any help would be awesome! i truly would love prepaid with unlimited data.
look up my zip and you will see tmobile is a no go. so now its att but which mvno and i need unlimited 3 or 4g...
thanks!!!

4G on straight talk

Do Straight Talk have 4G??
I have seen videos and read about people getting 4G to work after they flash they phone to straight talk, but they website dont mention anything about 4g..
I want to flash my sprint gs3 to straight talk.. but I dont think I can get 4g threw them.. but if I can just get one from them that will have 4g.. ill do that and just sell my gs3..
So, do straight talk have 4g or no??
Sent from my SPH-L710 using xda app-developers app

bigdreco said:
Do Straight Talk have 4G??
I have seen videos and read about people getting 4G to work after they flash they phone to straight talk, but they website dont mention anything about 4g..
I want to flash my sprint gs3 to straight talk.. but I dont think I can get 4g threw them.. but if I can just get one from them that will have 4g.. ill do that and just sell my gs3..
So, do straight talk have 4g or no??
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
Yes, they most certainly do... Google could have answered that for you much quicker

We might be quibbling about definitions here. If by 4G you mean LTE, then no, Straighttalk does not have 4G (of the LTE variety). 4G might also refer to HSPA+, which you'll get with Straighttalk if you have an HSPA+ compatible device.
I used a Pantech Element tablet with a Straighttalk microSIM i was swapping between an iPhone 4S and got HSPA+ service just fine. Now ofcourse the iPhone 4S does not have LTE but it would show a "4G" icon, the Pantech Element tablet was LTE compatible but i wasn't using it on any AT&T LTE plan, but it would display the 4G icon as well when on Straighttalk.
Most of it is marketing parlance really. AT&T markets HSPA+ as 4G sometimes by using qualifiers and adjectives like "enhanced backhaul" and so forth, but it's still really really fast data, even if it's not LTE.
Just be mindful of the data cap on Straighttalk though.
If you're going to flash your Sprint S3 (which is CDMA) to Straighttalk, then definitely no 4G, as you'll be using Verizon's CDMA service on Straighttalk and using EVDO (which is 3G) for data.
Have you thought about selling/trading your Sprint S3 for either a TMobile or AT&T version? You'll get much faster data on Straighttalk either with Tmobile or AT&T.

LordLugard said:
We might be quibbling about definitions here. If by 4G you mean LTE, then no, Straighttalk does not have 4G (of the LTE variety). 4G might also refer to HSPA+, which you'll get with Straighttalk if you have an HSPA+ compatible device.
I used a Pantech Element tablet with a Straighttalk microSIM i was swapping between an iPhone 4S and got HSPA+ service just fine. Now ofcourse the iPhone 4S does not have LTE but it would show a "4G" icon, the Pantech Element tablet was LTE compatible but i wasn't using it on any AT&T LTE plan, but it would display the 4G icon as well when on Straighttalk.
Most of it is marketing parlance really. AT&T markets HSPA+ as 4G sometimes by using qualifiers and adjectives like "enhanced backhaul" and so forth, but it's still really really fast data, even if it's not LTE.
Just be mindful of the data cap on Straighttalk though.
If you're going to flash your Sprint S3 (which is CDMA) to Straighttalk, then definitely no 4G, as you'll be using Verizon's CDMA service on Straighttalk and using EVDO (which is 3G) for data.
Have you thought about selling/trading your Sprint S3 for either a TMobile or AT&T version? You'll get much faster data on Straighttalk either with Tmobile or AT&T.
Click to expand...
Click to collapse
Yea I have thought of selling/trading for a T-Mobile or AT&T version.. I think that's what I'm going to do now that I know for sire that I will get faster speeds.
Sent from my SPH-L710 using xda app-developers app

bigdreco said:
Yea I have thought of selling/trading for a T-Mobile or AT&T version.. I think that's what I'm going to do now that I know for sire that I will get faster speeds.
Sent from my SPH-L710 using xda app-developers app
Click to expand...
Click to collapse
That would be your best bet. In that case, you wouldn't have to flash either variant, since both of those carriers are supported on Straight Talk. The only thing you would have to do is configure the data settings to enable it. Your best bet would be to get the T-Mobile SIM, if they have good coverage and HSPA+ in your area, and use it in a T-Mo GS3. You may be able to go to a local Wal-mart and pick up a $45 card & SIM package and save a few $$ over buying it straight from Straight Talk.

LordLugard said:
We might be quibbling about definitions here. If by 4G you mean LTE, then no, Straighttalk does not have 4G (of the LTE variety). 4G might also refer to HSPA+, which you'll get with Straighttalk if you have an HSPA+ compatible device.
I used a Pantech Element tablet with a Straighttalk microSIM i was swapping between an iPhone 4S and got HSPA+ service just fine. Now ofcourse the iPhone 4S does not have LTE but it would show a "4G" icon, the Pantech Element tablet was LTE compatible but i wasn't using it on any AT&T LTE plan, but it would display the 4G icon as well when on Straighttalk.
Most of it is marketing parlance really. AT&T markets HSPA+ as 4G sometimes by using qualifiers and adjectives like "enhanced backhaul" and so forth, but it's still really really fast data, even if it's not LTE.
Just be mindful of the data cap on Straighttalk though.
If you're going to flash your Sprint S3 (which is CDMA) to Straighttalk, then definitely no 4G, as you'll be using Verizon's CDMA service on Straighttalk and using EVDO (which is 3G) for data.
Have you thought about selling/trading your Sprint S3 for either a TMobile or AT&T version? You'll get much faster data on Straighttalk either with Tmobile or AT&T.
Click to expand...
Click to collapse
I should have been more clear this is 100% correct in every way from top to bottom

Unlocked AT&T S3 I747 for MetroPCS/TMobile

Has anyone here bought an unlocked AT&T S3 to use on the MetroPCS/Tmobile network? If so has there been any issues? shorter battery life, bad connectivity?
I am debating getting the S3 unlocked or HTC One S. I would prefer the HTC One S but it doesn't have microSD slot

I have a SGH T999 Lte at&t branded unlocked and use on TMobile with the T999L lte rom with no ill effects.
Sent from my SGH-T999L using XDA Premium 4 mobile app

afwolfpacked said:
I have a SGH T999 Lte at&t branded unlocked and use on TMobile with the T999L lte rom with no ill effects.
Sent from my SGH-T999L using XDA Premium 4 mobile app
Click to expand...
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Is that the same model as my phone? So it would be advisable, after I got the S3 to flash it with a MetroPCS ROM after activation by Metro?
I thought there would be no need of a flash if I got an unlocked phone.

edo101 said:
Has anyone here bought an unlocked AT&T S3 to use on the MetroPCS/Tmobile network? If so has there been any issues? shorter battery life, bad connectivity?
I am debating getting the S3 unlocked or HTC One S. I would prefer the HTC One S but it doesn't have microSD slot
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You will have issues with 3G HSPA+ on 1700mhz, but 2G EDGE & 4G LTE will work just fine. If you live in a large metro area with a lot of LTE coverage it will be fine. I just went through this with my wife's phone, she had to have the Red one (AT&T specific).
edo101 said:
Is that the same model as my phone? So it would be advisable, after I got the S3 to flash it with a MetroPCS ROM after activation by Metro?
I thought there would be no need of a flash if I got an unlocked phone.
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There is no need to flash anything, just unlock it and add/edit the APN for TMo.

DJ_SpaRky said:
You will have issues with 3G HSPA+ on 1700mhz, but 2G EDGE & 4G LTE will work just fine. If you live in a large metro area with a lot of LTE coverage it will be fine. I just went through this with my wife's phone, she had to have the Red one (AT&T specific).
There is no need to flash anything, just unlock it and add/edit the APN for TMo.
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Sweet thanks! Both areas that I frequent have 4G and LTE coverage. My only concern is when I'm driving long distances which I often do, being in college and losing 2G signal in the middle of no where. So far with my Metro phones, I haven't seen anywhere I had 3G coverage. its always 2G and 4G/LTE

edo101 said:
Sweet thanks! Both areas that I frequent have 4G and LTE coverage. My only concern is when I'm driving long distances which I often do, being in college and losing 2G signal in the middle of no where. So far with my Metro phones, I haven't seen anywhere I had 3G coverage. its always 2G and 4G/LTE
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Good, that is exactly what we are seeing as well. Mostly LTE coverage with EDGE to fallback on. Most all Metro areas and major highways/interstates will have good coverage. Funny enough we live in the middle of nowhere, but there is a major highway nearby so we get LTE coverage.
On a side note, US carriers marketed HSPA as 3G and HSPA+ as 4g, but both are technically 3G. True 4G is LTE. I am not sure if Metro ever had HSPA service, I think that they were just CDMA then later added LTE and have been migrated to TMo's GSM/HSPA network which now uses Metro's LTE as well. Only the newer GSM Based phones would connect to HSPA.

I have my s3 i747 unlocked an on metro I cannot get no data

banks2878 said:
I have my s3 i747 unlocked an on metro I cannot get no data
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Check your APN settings.

i cant even get to the apn's when i goto more network then mobile networks it says insert Sim card to access network services but calling an text work fine

banks2878 said:
i cant even get to the apn's when i goto more network then mobile networks it says insert Sim card to access network services but calling an text work fine
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What firmware are you running?
Sent from my SGH-T999 using Tapatalk

4.3 rooted.. I got data now that I flashed a modem but its very slow datai don't know how to find the right 1..heres what the one I downloaded is called modem_CWM_I747UCUEMJB

Define Slow data please. Post Speed test results.

normally around 0.15mbs but sometimes it works great and I get around 15.00mbs

Given this is not an LTE device, that sounds about right. Weather, tower congestion do affect results.

Perseus71 said:
Given this is not an LTE device, that sounds about right. Weather, tower congestion do affect results.
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The I747 is an LTE device, my wife's (running on TMo) works just fine on LTE, just not HSPA+ 1700MHz. I'll run speed test if people would like.

Unlocked att siii will not access metro/t-mobile data
Can someone verify for me what the correct apn settings are? Should there be a network operator? And since I think the apn is finally right, do you have any more suggestions? Also, do you know if this is CDMA or GSM?

can I ask why people want to buy an ATT phone to use on a Tmobile carrier? On the S4 and Note versions, people buy Tmobile phones and use them on ATT, myself included. This is because of the bootloader, and the Tmobile phones cover ATT LTE channels while not the opposite.

Wasn't planned
I didn't intentionally set out to buy an AT&T phone, I was just looking to upgrade and this was the best deal. Or at least it looked to be on the surface. Do I just need to forget it and try to sell it?

If you are in an area recently upgraded by T-Mobile, the I747 will work just fine. However, if you are in an are not upgraded with LTE, etc, it's waay more trouble than its worth. The above post about not getting HSPA+21/42 is worth considering too though.
T-Mobile and AT&T are both GSM networks btw.
Sent from my SAMSUNG-SGH-I747 using Tapatalk

I am actually on Metro P.S, but they are on the T-mobile network now in Atlanta, Ga where I live. We do run 4glte,but so far the fastest mine will connect to shows "E" on my phone, edge maybe? One of the many I've spoken with at metro said E is 3g. One of their repair techs said I needed a different SIM card because I had a CDMA phone but when I got to the store that had one he said it was a GSM phone. It's already about been more trouble than it is worth, but as much effort as I've put into it already, I'd like to resolve it.