Develop Bugs

[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.
.
Click to expand...
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?
Click to expand...
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.
Click to expand...
Click to collapse
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!!!

tmobile to straight talk wirless

ok so i can get a sim from straight talk , cut the end off and put it in the micro slot - confermed by androidarea51
my question is, since I am getting the runaround on a carrier unlock code, is as follows:
If I root, rom, and flash anntennas and modems to my phone, will I become carrer unlocked?
is there any way to become carrier unlocked without getting the code from tmobile/samsung/or cellunlockers that charge a fee
I am perfectly open to the option of doing this myself with little concern on complexity of the flashing metheds if that is what is required.
so Expert opinion?

You don't have to. Check EBay for unlock, it's very cheap there.

Which Straight Talk Sim?
If you get a Straight Talk T-mobile Sim then you wouldn't need to unlock the phone at all. It is not required if you use the tmobile sim in a tmobile phone just chose that sim and it uses the tmobile coverage map and speeds (the other choice is a At&t sim which you would pick if you had a At&t note ii or if you have known issues with the coverage of tmobile in your area) No need to pay for unlock code or hassle with tmobile to give you one with this option. You would probably get faster speeds using the tmobile sim option from Straight Talk over the At&t option sim. For me at my location in Florida I get double speeds on a tmobile one vs At&t depends on your location. Sim cards are $14 I think or less on Straight Talk you could get one of each and try one month of each and compare. Just thought I would mention this as an option in case you didn't know.

impimms said:
If you get a Straight Talk T-mobile Sim then you wouldn't need to unlock the phone at all. It is not required if you use the tmobile sim in a tmobile phone just chose that sim and it uses the tmobile coverage map and speeds (the other choice is a At&t sim which you would pick if you had a At&t note ii or if you have known issues with the coverage of tmobile in your area) No need to pay for unlock code or hassle with tmobile to give you one with this option. You would probably get faster speeds using the tmobile sim option from Straight Talk over the At&t option sim. For me at my location in Florida I get double speeds on a tmobile one vs At&t depends on your location. Sim cards are $14 I think or less on Straight Talk you could get one of each and try one month of each and compare. Just thought I would mention this as an option in case you didn't know.
Click to expand...
Click to collapse
I received my unlock code for my T-mobile Note 2 in less than 48 hours, and right from T-mobile themselves and it was FREE... If you have been with T-mobile for 60 days or longer on a Monthly4G plan then you can request a free unlock for any phone you buy outright (off-contract) and you will then be free to stick ANY sim in that slot as long as it has the bands you require... Pretty sure that they will unlock it with out too much hassle but I guess it's all in who you get... (And the choices aren't GREAT by any means)!

I would prefer 3g everywhere n 3g at home with an att covered straight talk sim card as opposed to tmobile with 4 g in a few places an absolutly no signal at home regardless of what their falsified coverage map says (should be edge here according to that). I also want the cheeper plan.
I just looked a the wika n it says they partner with att n tmobile for gsm so I asked straightalk who they partner with in my area.
I have been told that straight talk opperates in the fasion of having an independent imei on the sim card as well as the sim code and dosent realy pay attention to the phones imei
Sent from my SGH-T889 using Tapatalk 2

Why Buy The Tmobile version of Galaxy Note II only to use it on ATT straight talk
I was just wondering what would the benefit of using the Tmobile version of the Galaxy Note II on AT&T-Straight talk and not using it on Tmobile-Straight talk. Wouldnt it make better sense just to use the AT&T version of the Galaxy Note II on the AT&T Straight talk network? ...and the Tmobile Galaxy Note II on the Tmobile Straight Talk Network?....Granted you have to wait a little longer until the AT&T version comes out but wouldnt that give you better service having the same provider???

Take some time and read up on some of the threads here. The tmobile version has the best long term growth potential. Then again, you could just wait. I love not having LTE, its such a horrible battery hog. I am getting 11mb download speeds on solavei (tmobile towers). But I work and play in a great coverage area.
Sent from my SGH-T889 using xda premium

mdt73 said:
Take some time and read up on some of the threads here. The tmobile version has the best long term growth potential. Then again, you could just wait. I love not having LTE, its such a horrible battery hog. I am getting 11mb download speeds on solavei (tmobile towers). But I work and play in a great coverage area.
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
How is soavei? I still gotta go att but im interested in an opinion of a member.
Sent from my SGH-T889 using Tapatalk 2

Using an german Galaxy Nexus in the USA

hey dudes,
im for a few month in the USA and i got my german galaxy nexus with me. I just wondered now if u can tell me where i can get the best mobile internet plan here and for what i have to care. I read in some forum that i can just use edge with at&t? i talked with a guy from verizon and he told me they just sell contracts with verizon phones. im kind of confused. somebody was in the same situation and can help me?
thanks a lot

you need to use a GSM carrier in the US (ATT and tmobile). both have prepaid options/no contract plans. There are also other plans that are not through ATT or Tmobile, but use their towers.
you can use HSPDA if the area you are in supports it.
you need to stay away from verizon and sprint.

Yah as long as ur phones gsm, you can use T-Mobile or att. If T-Mobile has good coverage in the areas your going to be in, use there prepaid plan. If they don't, I would go with straight talk using att service.
As long as your gnex is pentaband you'll get hspa+ on both T-Mobile and att. If your phone is not pentaband, then use att. T-Mobile uses an odd hspa+ frequency that really only works with there phones.
Sent from my Galaxy Nexus using xda premium

Zepius said:
you need to use a GSM carrier in the US (ATT and tmobile). both have prepaid options/no contract plans. There are also other plans that are not through ATT or Tmobile, but use their towers.
you can use HSPDA if the area you are in supports it.
you need to stay away from verizon and sprint.
Click to expand...
Click to collapse
thank you for ur fast answer, is ist normal that on the at&t homepage there a just contracts with unlimited phone flat and internet flat? 50 $ per month is kind of expensive in my opinion.

rbryant1983 said:
Yah as long as ur phones gsm, you can use T-Mobile or att. If T-Mobile has good coverage in the areas your going to be in, use there prepaid plan. If they don't, I would go with straight talk using att service.
As long as your gnex is pentaband you'll get hspa+ on both T-Mobile and att. If your phone is not pentaband, then use att. T-Mobile uses an odd hspa+ frequency that really only works with there phones.
Sent from my Galaxy Nexus using xda premium
Click to expand...
Click to collapse
i thought all galaxy nexus are pentaband? am i wrong?

fak3d said:
thank you for ur fast answer, is ist normal that on the at&t homepage there a just contracts with unlimited phone flat and internet flat? 50 $ per month is kind of expensive in my opinion.
Click to expand...
Click to collapse
That's not expensive at all. Maybe compared to the price you paid in Germany but for the the US its normal.

50$ a month is nothing compared to other plans here in the us. Simple mobile is only 40$ a month. That's the cheapest I've seen. Unlimited everything
Sent from my Galaxy Nexus using xda app-developers app

fak3d said:
i thought all galaxy nexus are pentaband? am i wrong?
Click to expand...
Click to collapse
no, there are 2 CDMA models of the galaxy nexus as well as a GSM model. im sure you have a GSM model since you're in germany.
the $50/mo price is fairly common in the US. you might consider (if you have a place to ship a package in the US) straight talk. uses att's network (which is larger than tmobiles in the US) and its only $45/mo + sales tax.

Does somebody know a solution with less minutes and still unlimted mobile internet access? i googled a lot, but didnt find anything. thanks a lot

fak3d said:
Does somebody know a solution with less minutes and still unlimted mobile internet access? i googled a lot, but didnt find anything. thanks a lot
Click to expand...
Click to collapse
Straight talk.

fak3d said:
Does somebody know a solution with less minutes and still unlimted mobile internet access? i googled a lot, but didnt find anything. thanks a lot
Click to expand...
Click to collapse
tmobile has a unlimited text and 5GB of internet, with only $100 min for $30/mo.

Moving into US, Which network should I use?

Hi,
I am moving to US soon. I would like to know which network is good in San Jose, California (95112) area.
I own an international Galaxy Note 2, would like to know whether their network support HSDPA/HSDPA+?
My question is which network has higher data speed? SMS and voice call are not so important for me.
I did do some google in AT&T and T-Mobile. Would like to know which network do you all recommended and use.
Thanks

Att is a safer bet because of the signal, but t-mobile isn't so bad also if you stay only in big cities.

I would try T-Mobile on their $30 100min, unlimited text and 5gb of hs data prepaid. If that is good enough for you stay with that or upgrade to one of their unlimited talk/text/tiered or unlimited data plans. If you see coverage being spotty where you most frequent then at&t will be the safer bet.
sent from my gt-i9505

@rbiter said:
I would try T-Mobile on their $30 100min, unlimited text and 5gb of hs data prepaid. If that is good enough for you stay with that or upgrade to one of their unlimited talk/text/tiered or unlimited data plans. If you see coverage being spotty where you most frequent then at&t will be the safer bet.
sent from my gt-i9505
Click to expand...
Click to collapse
Is it with mobile phone plan or under "bring your own phone" tab?

Straight talk 42.00 unlimited everything AT&T
Sent from my GT-N7100 using Tapatalk 4 Beta

melvinchng said:
Hi,
I am moving to US soon. I would like to know which network is good in San Jose, California (95112) area.
I own an international Galaxy Note 2, would like to know whether their network support HSDPA/HSDPA+?
My question is which network has higher data speed? SMS and voice call are not so important for me.
I did do some google in AT&T and T-Mobile. Would like to know which network do you all recommended and use.
Thanks
Click to expand...
Click to collapse
Hello Melvin,
Welcome to USA..
I live here in Bay Area, Oakland, san Francisco and San Jose
I am using International Note 2 and S4 i1905, my carrier is Straight Talk around $45 a month unlimited text talk and data.
Straight talk is using AT&T tower, so your note2 will support HSDPA/HSDPA+
which I am using right now.
anyway hope that help ...

Jesus u.s is expensive when it comes to cell phones. In Sweden I pay 35$ unlimited calls unlimited text and mms and unlimited 4g data. And we don't have anything called long distance like in the u.s.
Skickat från min GT-N7100 via Tapatalk 2

melvinchng said:
Is it with mobile phone plan or under "bring your own phone" tab?
Click to expand...
Click to collapse
It is confusing. Goto tmobiles prepaid website. I think it is T-Mobile.com/prepaidactivation. I am using it now but tmobiles post paid seems to have better service. I tried their postpaid recently and got signal almost everywhere. I am having less joy on their prepaid. It is still a great deal if it works for you.
sent from my gt-i9505

lonelime said:
Hello Melvin,
Welcome to USA..
I live here in Bay Area, Oakland, san Francisco and San Jose
I am using International Note 2 and S4 i1905, my carrier is Straight Talk around $45 a month unlimited text talk and data.
Straight talk is using AT&T tower, so your note2 will support HSDPA/HSDPA+
which I am using right now.
anyway hope that help ...
Click to expand...
Click to collapse
It is very interesting, $45 for everything. Also, $60 including international call. I have checked the website and unable to find the locations of international call. If you have the location, please link me there.
So basically it runs on internet? And how is the internet actually, is it fast enough? As I am using International version of Note 2, it only support up to HSDPA+.
And lastly, is tether supported?

melvinchng said:
It is very interesting, $45 for everything. Also, $60 including international call. I have checked the website and unable to find the locations of international call. If you have the location, please link me there.
So basically it runs on internet? And how is the internet actually, is it fast enough? As I am using International version of Note 2, it only support up to HSDPA+.
And lastly, is tether supported?
Click to expand...
Click to collapse
for international calling I would refer you buy the prepaid phone card here for $5 bucks for around 2 hrs I think , but not sure.
for HSDPA speed is not that fast, and not that low...you can live with that speed
tether is supported, but if you abuse it, they will terminate your service...
I tether sometimes... not much.. but it work....

lonelime said:
for international calling I would refer you buy the prepaid phone card here for $5 bucks for around 2 hrs I think , but not sure.
for HSDPA speed is not that fast, and not that low...you can live with that speed
tether is supported, but if you abuse it, they will terminate your service...
I tether sometimes... not much.. but it work....
Click to expand...
Click to collapse
Can I get more than 10mbps for H+ there?
Accidentally sent from my Samsung Galaxy Note 2

[Q] No Tmobile Towers In Iowa. Help!!!

i bought my note 3 in sc and came back to iowa to work til thanksgiving. Problem is i have no data signal no 4g 3g or any g. tech support says that tmobile has a contract with iowa wireless to allow text and talk but no data. i was wondering if there was a way to unlock the phone so that it can use other cell towers in the area to allow me to get data. will rooting help this or am i just stuck until i leave iowa. Please help really sucks to have so much phone and not be able to use it to its potential. Sorry if i am in the wrong section please move to the correct one. Thanks. Also my friend has 2g on his tmobile phone tech support says that he may not have it all the time though.

Rooting won't make a tower show up. The best you can possibly do would be to try to get activated on a different provide (AT&T for example). But you would have to do some work, and buy an AT&T account to use.
Otherwise, you are stuck with what you got. Coverage maps give you a rough idea of what is available.
http://www.t-mobile.com/coverage/pcc.aspx/

krelvinaz said:
Rooting won't make a tower show up. The best you can possibly do would be to try to get activated on a different provide (AT&T for example). But you would have to do some work, and buy an AT&T account to use.
Otherwise, you are stuck with what you got. Coverage maps give you a rough idea of what is available.
http://www.t-mobile.com/coverage/pcc.aspx/
Click to expand...
Click to collapse
what i would probably do is try to pickup a wifi hotspot from a different carrier with good coverage and use wifi calling on the phone, not ideal by far though $

If it's SIM unlocked you could try getting a straight talk SIM as those use AT&T's network. It's prepaid so you don't need to sign a contract and can end it after a month.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app

CalcProgrammer1 said:
If it's SIM unlocked you could try getting a straight talk SIM as those use AT&T's network. It's prepaid so you don't need to sign a contract and can end it after a month.
Sent from my SAMSUNG-SGH-I717 using xda app-developers app
Click to expand...
Click to collapse
This is what I was thinking. Buy a prepaid SIM, stick it in your phone and see if it works.

Go to that unlock site, and yes, the unlock code for mine came in about 20 minutes. Then head over to the att thread. There is a page for Tmobile on att with setting for the MMS etc.