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Hi, im new, 2nd post (1st thread)
So heres some background info, I have AT&T but i work for t-mobile. Had my AT&T GS2 phone stolen by a t-mobile customer and the company I work for are great people and decided to replace my GS2 with a t-mobile gs3 for $100. They even offered me a dealer line to go with it (I get unlimited everything [NO THROTTLING] for $22 a month)
So heres my question. I know for sure that it wouldnt connect to AT&T LTE but for whatever reason if I decide to unlock and use it on my AT&T plan, does it have the proper bands required to connect to AT&T's HSPA+ network or would I be running edge?
I know all iphone's used on T-Mobile only run EDGE. (Coming later this fall they will be able to connect to t-mobile's 4g HSPA+ network)
Anybody have a clue?
I'm pretty sure it would work on atnt 3g speeds
Sent from my SGH-T999 using xda premium
It will work. The T999 has support for 1900 Mhz hspa+, which is the AT&T band.
Thanks. Much appreciated.
Confirmed working. I unlocked my T999. I have 2 sim cards, StraightTalk and Tmobile monthly 4G. I travel a lot, so depending on which carrier gives me the best signal that's what I would use. Usually, StraightTalk would give me the better signals...although Tmobile still gives me faster data speeds. just thought id share .02.
2Phonez said:
Hi, im new, 2nd post (1st thread)
So heres some background info, I have AT&T but i work for t-mobile. Had my AT&T GS2 phone stolen by a t-mobile customer and the company I work for are great people and decided to replace my GS2 with a t-mobile gs3 for $100. They even offered me a dealer line to go with it (I get unlimited everything [NO THROTTLING] for $22 a month)
So heres my question. I know for sure that it wouldnt connect to AT&T LTE but for whatever reason if I decide to unlock and use it on my AT&T plan, does it have the proper bands required to connect to AT&T's HSPA+ network or would I be running edge?
I know all iphone's used on T-Mobile only run EDGE. (Coming later this fall they will be able to connect to t-mobile's 4g HSPA+ network)
Anybody have a clue?
Click to expand...
Click to collapse
Sorry but i think is funny that you wotk for tmobile and get att instead lol, i would do it too,att has better service im on tmobile cause is cheaper tho
Sent from my SGH-T999 using Tapatalk 2
Tmobile has a faster 4g network where im at (New Jersey)
22 dollars? What crazy plan is this
Sent from my Galaxy Nexus using Tapatalk 2
babymatteo said:
Confirmed working. I unlocked my T999. I have 2 sim cards, StraightTalk and Tmobile monthly 4G. I travel a lot, so depending on which carrier gives me the best signal that's what I would use. Usually, StraightTalk would give me the better signals...although Tmobile still gives me faster data speeds. just thought id share .02.
Click to expand...
Click to collapse
Hi, I'm waking up this thread as I have the T999 phone and recently switched to Straight Talk SIM (AT&T).
I only get EDGE on the phone using my Straight Talk SIM.
Is there anything I need to do with the phone? It runs the latest stock, not rooted or modified as such. It is carrier unlocked.
I unlocked my t999 and using it on my contract att plan, getting hspa+ atm, just check the bands that it supports, which are 850mhz 1900mhz for att's 3.5g(not 4g) LTE is 4G.
elaxsjo said:
Hi, I'm waking up this thread as I have the T999 phone and recently switched to Straight Talk SIM (AT&T).
I only get EDGE on the phone using my Straight Talk SIM.
Is there anything I need to do with the phone? It runs the latest stock, not rooted or modified as such. It is carrier unlocked.
Click to expand...
Click to collapse
I also got straight talk att and I get hspa+.
Sent from my Calculator with Android.
jose makalolot said:
I also got straight talk att and I get hspa+.
Sent from my Calculator with Android.
Click to expand...
Click to collapse
What apn settings do you use? I plugged my ATT sim into an unlocked SGH-T999 today with the ST APN settings and only get 3G. Speed isn't bad - 1164k down/1041 up, but I would like to tap into the HSPA+ if possible.
Hello, I apologize if this has been asked already:
My phone broke and my friend has an ATT Galaxy S3 that I can use. I'm on T-Mobile. Can I root it and flawlessly use a custom T-Mobile ROM on it including Wifi Calling? In other words, are the phones exactly the same except different software?
Thanks!
Wifi calling wont work. And you wont get 3g.
Sent from my SGH-T999 using Tapatalk 2
The AT&T version doesn't have AWS bands required for T-Mobile HSPA.
Sent from my SGH-T999
Simply stated. Only internet you will get is 2g. You can make calls just fine. From my experience of using atnt phones on tmobile.. reception is poorer when they phones aren't made for tmobile.
Thanks so much for your answers.. saved me from making a big mistake!
So I've read thru many threads on here and found people that seemed to have flashed their tmobile ROM onto their AT&T device in order to get proper 3G+ speeds.
1) Does this actually work?
2) Is it better to flash the other way (if possible, AT&T rom onto Tmobile) in order to get maximum service from both phones? What is the best/better phone to purchase for future LTE future proofing?
jaggyjagz said:
So I've read thru many threads on here and found people that seemed to have flashed their tmobile ROM onto their AT&T device in order to get proper 3G+ speeds.
1) Does this actually work?
2) Is it better to flash the other way (if possible, AT&T rom onto Tmobile) in order to get maximum service from both phones? What is the best/better phone to purchase for future LTE future proofing?
Click to expand...
Click to collapse
I am also on the t-mobile Q&A section looking for answers... the best phone for future proof and LTE is the AT&T version... no doubt... now... I am waiting for an AT&T Stock Rooted WITH MODEM included in the same flash zip before I begin testing myself... I already ordered from ebay a dual sim card adapter for the Note 2, and the Note 2 is already unlocked... so... any news on this would be great...
I just flashed Tmobile Jedi X3 with my att note 2...all working perfectly....the steps I took was just to flash rom and one of our att kernels and youll be fine...didnt have to flash modem....just put my straight talk apn in done....Everything perfect...btw jedi X3 is super fast....:good::highfive:
jaggyjagz said:
So I've read thru many threads on here and found people that seemed to have flashed their tmobile ROM onto their AT&T device in order to get proper 3G+ speeds.
1) Does this actually work?
2) Is it better to flash the other way (if possible, AT&T rom onto Tmobile) in order to get maximum service from both phones? What is the best/better phone to purchase for future LTE future proofing?
Click to expand...
Click to collapse
Sounds like you might be in the same boat as me. Anxious to get a Note II but not sure which network to commit to with it. Your comment about needing to get a TMo ROM to get "proper 3G+ speeds" is disconcerting. It also pushes me a bit towards TMo since it's got the LTE radio promised for future update.
What exactly is wrong with the stock device's 3G+ speeds on AT&T?
Where I live and work (Los Angeles area - San Fernando & Santa Clarita valleys), LTE's not activated, and no firm date when it will come our way. AT&T's HSPA data speeds here aren't anything to write home about, but neither are TMo's when I tested one of their devices in the local shop. My AT&T phone is lucky to get 4Mb/s down, 0.2Mb/s up, and generally only about 2-3Mb/s down. The TMo Galaxy SIII I tested got 4MB/s down. Hard numbers to swallow when I've got an SIII on VZW LTE pulling down 20Mb/s in the same area.
alewis2k12 said:
I just flashed Tmobile Jedi X3 with my att note 2...all working perfectly....the steps I took was just to flash rom and one of our att kernels and youll be fine...didnt have to flash modem....just put my straight talk apn in done....Everything perfect...btw jedi X3 is super fast....:good::highfive:
Click to expand...
Click to collapse
Jedy 3 is an international rom, not T-Mobile with wifi calling... with 3.5G on T-mobile on Jedi 3? (HSPA+)
Clarification Requested
alewis2k12 said:
I just flashed Tmobile Jedi X3 with my att note 2...all working perfectly....the steps I took was just to flash rom and one of our att kernels and youll be fine...didnt have to flash modem....just put my straight talk apn in done....Everything perfect...btw jedi X3 is super fast....:good::highfive:
Click to expand...
Click to collapse
I need clarification on this. Just because the ROM flashed worked, doesn't necessarily mean the proper AWS radio's were activated to attain 4G speeds that are required on T-mobile (this is nothing to do with LTE).
Are you saying that by flashing the tmobile ROM onto your at&t note 2, you are able to attain all connections (not just Edge, but HSPA+ 4G) with your AT&T device to tmobile using AWS? I know Tmobile has begun refarming out to 4G on a different band that is compatible with more handsets, so you might just be in an area where they have already done so, which mistakes you into believing that you are actually connecting via the old school AWS Tmobile bands, when you aren't.
I really need to decide which phone I want to take the risk on - The tmobile LTE is locked apparently, doesn't seem to show as many capable bands as the AT&T version, and also, I'm not sure what to bank on in terms of there being a software vs hardware lock (Would be nice if the tmobile can be unlocked via software to fully operate on all LTE modes that the AT&T supports).
I'm actually in Canada, and would probably end up needing to purchase the Wind version in order to get what I'm looking for (since Wind operates on the same AWS frequencies as tmobile). But losing out on Bell/Rogers/Telus LTE in the process is just something I don't want to do either.
Going to have to see what can be unlocked via software on all these different phones................
I would also appreciate a response from someone if this is possible... using T-Mobile ROM and modem to work on At&t (with aws frequencies).... just like the S2 I717 mod which after flashing was working with aws frequencies....
ysr84 said:
I would also appreciate a response from someone if this is possible... using T-Mobile ROM and modem to work on At&t (with aws frequencies).... just like the S2 I717 mod which after flashing was working with aws frequencies....
Click to expand...
Click to collapse
Yes... it should... as soon as I get my dual sim card adapter for the Note 2... I will post a million results/combinations here on T-Mobile and AT&T forums... I just don't want to open the back cover 30 times a day and swap sims a bunch of times... with the adapter I just insert the 2 sim cards and done... testing all the way from that point on...
Sent from my SAMSUNG-SGH-I317 using XDA Premium HD app
I shall be waiting impatiently.... and would happily buy you a beer for your effort
bump... any news?
Yes u can .. I confirm this.. using at&t rom on my tmobile note 2
Sent from my SAMSUNG-SGH-I317 using xda premium
AT&T Note 2 on T-mobile 3G/4G?
sanchitgrover said:
Yes u can .. I confirm this.. using at&t rom on my tmobile note 2
Sent from my SAMSUNG-SGH-I317 using xda premium
Click to expand...
Click to collapse
I have the SAMSUNG-SGH-I317 from AT&T, unlocked via unlock code from AT&T. No root, stock AT&T android 4.1.1. I got the t-mobile microSIM card with an unlimited talk and 2GB unlimited data plan, but I can not get tmobile 3G/4G working reliably. I get HSDPA/HSPAP/UMTS/EDGE randomly. 80% EDGE, 20% high speed between 4-8mbps down, 0.7-1.9mbps up. I am in Los Angeles, CA.
I know my SGH-I317 does not have the 1700MHz antenna needed for t-mobile 3G/4G data, but somehow I get 3G/4G 20% of the time. I have not adjusted any special settings on my phone, other than to reset the APN to default epc .tmobile .com. My guess I am getting 3G/4G via the 2100MHz antenna for download, but without the 1700MHz for fast upload, I get 0.7-1.9mbps only. But most of the time I am stuck at EDGE.
So has anyone gotten the AT&T Note II to reliably work on t-mobile 3G/4G? is there a special setting I need to enter on my phone? does flashing the t-mobile ROM on the AT&T phone solve any of the 3G/4G issue? or will I lose the unlock on my phone when I root or when I flash t-mobile ROM on my AT&T Note 2?
Any help greatly appreciated.
SGh i317 unlocked on T-mobile with 4g
rob00 said:
I have the SAMSUNG-SGH-I317 from AT&T, unlocked via unlock code from AT&T. No root, stock AT&T android 4.1.1. I got the t-mobile microSIM card with an unlimited talk and 2GB unlimited data plan, but I can not get tmobile 3G/4G working reliably. I get HSDPA/HSPAP/UMTS/EDGE randomly. 80% EDGE, 20% high speed between 4-8mbps down, 0.7-1.9mbps up. I am in Los Angeles, CA.
I know my SGH-I317 does not have the 1700MHz antenna needed for t-mobile 3G/4G data, but somehow I get 3G/4G 20% of the time. I have not adjusted any special settings on my phone, other than to reset the APN to default epc .tmobile .com. My guess I am getting 3G/4G via the 2100MHz antenna for download, but without the 1700MHz for fast upload, I get 0.7-1.9mbps only. But most of the time I am stuck at EDGE.
So has anyone gotten the AT&T Note II to reliably work on t-mobile 3G/4G? is there a special setting I need to enter on my phone? does flashing the t-mobile ROM on the AT&T phone solve any of the 3G/4G issue? or will I lose the unlock on my phone when I root or when I flash t-mobile ROM on my AT&T Note 2?
Any help greatly appreciated.
Click to expand...
Click to collapse
Hey I got a unlocked & Rooted At&t Note 2 on T-mobile running CleanRom with perfect 4g. Before I rooted my phone I changed my phones modem to T-mobiles because I only had edge. After that I have flashed several different At&t Roms and still have 4g. On speed test I get about 7-9mbs download and 2-3 mbs on upload not the best but way better than edge
Do you get LTE yet
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
Unlocked at&t Note 2on t-mobile with 4g
tdy2kn1 said:
Do you get LTE yet
Sent from my SAMSUNG-SGH-I317 using Tapatalk 2
Click to expand...
Click to collapse
I dont know...LTE for t-mobile isn't in Jacksonville FL yet. I am suppose to be going to California in a month or two and from what i heard , there is LTE in the biigger cities Im excited to find out and i'll keep you updated if i do.
I have att note 2 running clean rom with ublocked carrier on t mo. Here in la I have not see lte but we are aleay quite late getting upgrade. Most likely you will need to go to san francisco or techie area to test it
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
Unlocked at&t Note 2on t-mobile with 4g
PUTALE said:
I have att note 2 running clean rom with ublocked carrier on t mo. Here in la I have not see lte but we are aleay quite late getting upgrade. Most likely you will need to go to san francisco or techie area to test it
Sent from my SAMSUNG-SGH-I317 using xda app-developers app
Click to expand...
Click to collapse
Yea your right...hey i know this has nothing to do with this thread but i want to ask you something. You have the exact set up that i am currently using.I also have an unlocked At&t Note 2 SGH-i317 on T-mobile running CleanRom SE1.5. I absoulutely love it. I like the stock look with better performance. Are you using another Kernel? And im also thinking about flashing a new Rom what would you recommend? Im kinda looking for something Similar to Clean but better battery life. Any Suggestions???
G7Baker said:
Yea your right...hey i know this has nothing to do with this thread but i want to ask you something. You have the exact set up that i am currently using.I also have an unlocked At&t Note 2 SGH-i317 on T-mobile running CleanRom SE1.5. I absoulutely love it. I like the stock look with better performance. Are you using another Kernel? And im also thinking about flashing a new Rom what would you recommend? Im kinda looking for something Similar to Clean but better battery life. Any Suggestions???
Click to expand...
Click to collapse
I am actually using the CleanROM 4.5 (haven't flashed 4.6.1 as I do not see much new on that ROM). I am actually using it on the stock kernel because I am not a huge flasher like many of the members here. Since Note 2 is my daily driver, I don't want to keep updating it and customize it after each ROM flashing. I like the CleanROM 4.5 since it was the way I got it and I just updated to the new version. The battery life is pretty good as I can last a day or more with moderate use.
Unlocked at&t Note 2on t-mobile with 4g
PUTALE said:
I am actually using the CleanROM 4.5 (haven't flashed 4.6.1 as I do not see much new on that ROM). I am actually using it on the stock kernel because I am not a huge flasher like many of the members here. Since Note 2 is my daily driver, I don't want to keep updating it and customize it after each ROM flashing. I like the CleanROM 4.5 since it was the way I got it and I just updated to the new version. The battery life is pretty good as I can last a day or more with moderate use.
Click to expand...
Click to collapse
Yea im the same way. You have an At&t note 2 too?
yep using ATT Note 2 on TMo's network.
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...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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
Click to expand...
Click to collapse
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.
Click to expand...
Click to collapse
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.
I have a verizon note 3. I am on tmobile now. Using a jelly bean rom, I have everything working except for wi fi calling? Anyone know how to get it? or how to load a tmobile rom on the verizon note 3?
I tried loading a tmobile rom but the wifi would not connect?
Thanks,
Kevin
trpfn03 said:
I have a verizon note 3. I am on tmobile now. Using a jelly bean rom, I have everything working except for wi fi calling? Anyone know how to get it? or how to load a tmobile rom on the verizon note 3?
I tried loading a tmobile rom but the wifi would not connect?
Thanks,
Kevin
Click to expand...
Click to collapse
Unless I'm way off here, Verizon uses cdma where tmibile us gsm. How is your Verizon note even working on T-Mobile to begin with?
Sent from my SM-N900T using Tapatalk
trpfn03 said:
I have a verizon note 3. I am on tmobile now. Using a jelly bean rom, I have everything working except for wi fi calling? Anyone know how to get it? or how to load a tmobile rom on the verizon note 3?
I tried loading a tmobile rom but the wifi would not connect?
Thanks,
Kevin
Click to expand...
Click to collapse
I'm using my phone on Tmobile right now. I just need mk2 radios to get lte to work same time as receiving calls. And correct answer.
Sent from my SCH-I545 using xda app-developers app
suckmikehawk88 said:
I'm using my phone on Tmobile right now. I just need mk2 radios to get lte to work same time as receiving calls. And correct answer.
Sent from my SCH-I545 using xda app-developers app
Click to expand...
Click to collapse
verizon note 3? which rom are you running?
Correct apns*
Sent from my SCH-I545 using xda app-developers app
suckmikehawk88 said:
Correct apns*
Sent from my SCH-I545 using xda app-developers app
Click to expand...
Click to collapse
where you able to get wifi calling? do you have a link to the rom you used?
thanks
Verizon has world phones, that have some GSM capabilities, they also have SIM cards, because LTE is GSM tech and SIM is part of LTE specs, so yeah it should work at least on some frequencies. The only ROM that has WiFi calling, as far as I know is T-mo. There was some guy claiming he loaded pretty much all different ROM's he could get into his Note and it worked, but don't remember details, do search maybe in International Note 3 forum and see if T-mo is mentioned. Not sure if you care, but right now loading ROM's could trigger Knox flag, so maybe research this before hand and I have a feeling soon we may have some new breakthrough, when loading any ROMS is no problem, but not sure if Knox flag can ever be reversed, once tripped, there is no way for now.
BTW I'm not sure if you're aware, once you have WiFi calling, you can call home from around the World on WiFi for free. Don't let other people call you, but you can make free international calls home as long as you're on WiFI. It does not work for local calls. That is outside the new international calling plan T-mo has.
My Verizon Note 3 worked somewhat on T-Mobile
I had my Verizon Note 3 functional on T-Mobile for about a week but ended up buying a used T-Mobile Note 3 after having random service issues. With the correct APN settings on the V Note 3, 4G worked and I was able to browse just fine but the phone was not reliable. Quite often after making a call, it would switch away from 4G (sometimes to Edge) and would take minutes to re-establish a reliable data connection on 4G. During this time, whether it was possible to make another call was a hit or miss. Even when it said 3g, or Edge, calling was sometimes not possible. Usually I would wait a while before trying again. Data was in and out at times. I was on the latest official Android release: 4.4.4. And other users with T-Mobile phones were not having similar issues in the same location so I know it was not location specific.
I thought about downgrading to another rom and rooting, then enabling LTE band 4, but I wasn't sure that would fix the service-related issues. Now with the T-Mobile version, I have zero service problems. We had a similar experience on T-mobile with a Verizon Galaxy S5 and after getting the T-Mobile version, the problems were fixed.
So, IMO, the V Note 3 does work on GSM networks like T-Mobile. How reliable it works compared to the other Carrier specific models is debatable.