skyrocket gets 3/4g on tmobile why not x? - AT&T, Rogers HTC One X, Telstra One XL

they have the same bands...why can the skyrocket grab 3/4g on tmobile but the one x cannot?
i love my skyrocket its unlocked and rooted. just looking for something new...

kdm212 said:
they have the same bands...why can the skyrocket grab 3/4g on tmobile but the one x cannot?
i love my skyrocket its unlocked and rooted. just looking for something new...
Click to expand...
Click to collapse
2 different companies
2 different philosophies
there is no bootloaders to worry about or s-off or any of that crap on samsung phones. its easy to swap out the modems without bricking your device
HTC phones are completely different. swap out the radio and if the radio doesnt work, it will probably brick it.
Samsung has ODIN and Heimdall which are lifesavers when it comes to hacking
HTC has......... RUUs as long as you didnt brick with a bad radio flash
also, the tmo samsung t989 and the skyrocket 727 are the SAME phone....with only a change to some firmware and i believe the positioning of the accellorometer
i really wish that hack had never been discovered because since then, EVERY device that comes out that same question gets asked.....its not fair! they can do it on phone X how come it wont work on phone M?!?

i didnt take all of that stuff into consideration. well i guess i will hold onto my skyrocket for now. thx!

Seeing as the One S gets both AT&T and T-Mobile 3G/4G I assume AT&T purposely blocked the bands because they suck.

Hey guys, try to put all your efforts into this thread: http://forum.xda-developers.com/showthread.php?t=1610323
Hope isn't lost. It should work, but it won't be as easy as swapping radios from an identical device.

Related

Why no custom roms for Rogers Dream?

Can the phone really be that different from the Dev Phone for T-Mobile G1?
Seems like it would be desirable model for US 3G (AT&T). No interest in this model?
-James
Because no one likes Canadians.
vr24 said:
Because no one likes Canadians.
Click to expand...
Click to collapse
lmaoo..yeah that might just be it..haha
there are a few people here who have the rogers phones and have flashed hero and other roms to their phone just cause it does not say rogers does not mean it won't work be careful cause you don't want a paperweight
I'm on U.S. AT&T 3G.
But thanks for the pointless racist comment that does nothing to address the question.
rogers roms
Last time I checked there were several Custom Rogers Roms.
Did you look at soulife's ?
(http://forum.xda-developers.com/showthread.php?t=523608)
Is there a specific modifcation that can be done to the custom roms to get them to load on the Rogers Dream?
T-Mobile's lack of 3G coverage was not desirable to me so I imported one.
I know Cyanogen mentioned somthing about it but I can't find any information otherwise.
-James
enomther said:
Last time I checked there were several Custom Rogers Roms.
Did you look at soulife's ?
(http://forum.xda-developers.com/showthread.php?t=523608)
Click to expand...
Click to collapse
Aren't these rogers roms ported for use on the TMobile G1? AFAIK, those don't actually run on a real Rogers Dream, but if I'm wrong, I'de be happy.
-James
um
removed ... since I was uninformed.
~cheers~
enomther said:
So let me get this straight ... you imported a Rogers Dream so that you could use AT&T in the states ? umk (There are ways to unlock the TMO G1's for AT&T use)
Eitherway ... as far as I know, if you're rooted and have a nice recovery image installed, like Cyanogen's ... you should be able to (with no problem) load a custom Roger's ROM like soulife's (which I liked very much, when I used it).
Dream hardware is dream hardware ... doesn't really matter where you got it.
You may need the HardSPL though.
~cheers~
Click to expand...
Click to collapse
This is wrong, and there is a whole thread in the Dream forum about it. The Rogers Dream is slightly different hardware and we can't build custom kernels for it yet. Its being worked on, though.
cyanogen said:
This is wrong, and there is a whole thread in the Dream forum about it. The Rogers Dream is slightly different hardware and we can't build custom kernels for it yet. Its being worked on, though.
Click to expand...
Click to collapse
I stand fully corrected then!
enomther said:
So let me get this straight ... you imported a Rogers Dream so that you could use AT&T in the states ? umk (There are ways to unlock the TMO G1's for AT&T use)
Eitherway ... as far as I know, if you're rooted and have a nice recovery image installed, like Cyanogen's ... you should be able to (with no problem) load a custom Roger's ROM like soulife's (which I liked very much, when I used it).
Dream hardware is dream hardware ... doesn't really matter where you got it.
~cheers~
Click to expand...
Click to collapse
Cyonegens roms don't run on the Rogers, he even has stated as much. He had a custom boot iamge at one point for the Rogers DReam but pulled it because it didn't actually work.
I would agree, in theory, G1 hardware is G1 hardware, but something is different about the device some how. It is a newer revision of the G1 and uses a different amplifier for the different 3G frequencies so who knows what other minor tweaks were done.
Yes I imported one. And I also own a developer phone which runs on AT&T. Now I think it's obvious to anyone that Edge speeds for data or less than desirable. This is simply an unfortunate state of T-Mobile undesirable 3G deployment which is hardly anywhere useful, and AT&T much larger deployment with larger spectrum assets in many markets. AT&T is no Verizon, but it's more solid than T-Mobile any day, where I live for sure. Maybe when T-Mobile goes 3G here later this year I will reconsider but for now I'm happy with AT&T, not to mention my grandfathered data plan is less than T-Mobiles and I'm constantly hitting 1 - 1.5 mbit on AT&T's 3G around here.
-James
Maybe google hates Canadians. I find it odd that there is no developer phone with North American 3G (AT&T/Rogers) frequencies.
-James
jmacdonald801 said:
Cyonegens roms don't run on the Rogers, he even has stated as much. He had a custom boot iamge at one point for the Rogers DReam but pulled it because it didn't actually work.
I would agree, in theory, G1 hardware is G1 hardware, but something is different about the device some how. It is a newer revision of the G1 and uses a different amplifier for the different 3G frequencies so who knows what other minor tweaks were done.
Yes I imported one. And I also own a developer phone which runs on AT&T. Now I think it's obvious to anyone that Edge speeds for data or less than desirable. This is simply an unfortunate state of T-Mobile undesirable 3G deployment which is hardly anywhere useful, and AT&T much larger deployment with larger spectrum assets in many markets. AT&T is no Verizon, but it's more solid than T-Mobile any day, where I live for sure. Maybe when T-Mobile goes 3G here later this year I will reconsider but for now I'm happy with AT&T, not to mention my grandfathered data plan is less than T-Mobiles and I'm constantly hitting 1 - 1.5 mbit on AT&T's 3G around here.
-James
Click to expand...
Click to collapse
Yes I was corrected, sorry about the confusion.
enomther said:
Yes I was corrected, sorry about the confusion.
Click to expand...
Click to collapse
But the answer is likely in the cyanogen's correction on the matter ... if they can't build custom kernels ... that would explain the lack of ROMs.
enomther said:
But the answer is likely in the cyanogen's correction on the matter ... if they can't build custom kernels ... that would explain the lack of ROMs.
Click to expand...
Click to collapse
A few people (PhaseBurn in particular) are trying hard to get the specs/code needed to do this. We are kind of at the mercy of HTC right now.
jmacdonald801 said:
I'm on U.S. AT&T 3G.
But thanks for the pointless racist comment that does nothing to address the question.
Click to expand...
Click to collapse
Are Canadians really a different race?
Glad you got your question answered though

[Q ] Rogers or AT&T?

Hi all! I live in Argentina and I want to buy a Captivate either in USA or Canada (can do both). The reason is they are $200 cheaper there. Yes, i know.
Well, the question is which Captivate to get, the i897 or the i896 (Rogers). I believe there are no GPS issues with the Rogers version but I'm not sure if one can use the custom roms from the i897 on it, and if the gps still works fine when the rom is changed.
I'd really like to be able to use the gps.
Please help me decide...
Its going to be hard to find an answer since most people here only have one or the other however i can say this
I bought mine from rogers and had absolutely no problems with the gps
I then installed a gingerclone rom which is 2.2 and there were no problems with the gps
I also upgraded to the 2.2 froyo ATT using odin and still no gps issues :S.
So basically... If your going to upgrade it to a rom you like, it should be fine
Get the rogers one if you don't want the ATT branding on the front of the phone. The rogers captivate only has the samsung logo on it.
Also the rogers captivate stock allows for side loading and mobile ap.
Sent from my SAMSUNG-SGH-I897 using XDA App
My biggest gripe right now is problems with unlocking the phone. I've read the forum but found that a lot of people report mixed experiences with this.
I believe they share the exact same radio bands, so you're free to choose. Anecdotally, it seems people are happier with the Rogers one... and many of them were probably built later (newer) than the AT&T ones which may help avoid some of the gremlins that early adopters have reported.
Yeah, but unlocking seems to be very hard and not at all a certainty...
Sent from my GT-I5700 using Tapatalk

Rogers ROM on AT&T HTC One XL

Was wondering if we can put Rogers ROM on AT&T for 2 reasons.
Turn off LTE and tethering.
Can anyone with Rogers confirm they have tethering ability. Also do you have to pay extra for tethering with Rogers.
I bet AT&T will block those.
hexproject said:
Was wondering if we can put Rogers ROM on AT&T for 2 reasons.
Turn off LTE and tethering.
Can anyone with Rogers confirm they have tethering ability. Also do you have to pay extra for tethering with Rogers.
I bet AT&T will block those.
Click to expand...
Click to collapse
Confirmed! We have tethering enabled(free) as well as the option to turn off LTE.
As for loading the Rogers rom onto the AT&T handset, I don't see why not other than maybe some differences in what 3G/4G LTE Bands are made available. Rogers and AT&T are very close in offerings though. Don't know if there's any relation nowadays, but they used to be partners a good 10 years ago here in Canada. I think Rogers bought them out of their wireless venture. Fun fact of the day. Minus the fun
Anyone has an unlocked rogers htc one xl phone that also has an att sim card can do a test if att sim card will get lte speed with rogers rom?
The Radio firmware is a separate image from the system rom. Once we have a Rogers RUU, you should be able to flash the boot.img and system.img from that without worrying about altering the way your radio connects to the AT&T network.
So what would be a better choice? Att handset with rogers rom or rogers handset stock rom. I just want to be able to tether sometimes without att giving me trouble and turn att off. Since i will be getting out of contract... Price for the handset should be the same.
The only difference between the AT&T model and Rogers model is the ROM, so it really wouldn't make a difference. Go with whichever option is easier for you.
(I accidentally thanked your post. Enjoy it lol)
Just a quick question for you HOX Rogers owners out there, does the rogers version include any Rogers bloatware? or splash screens?
MEGABYTEPR said:
Just a quick question for you HOX Rogers owners out there, does the rogers version include any Rogers bloatware? or splash screens?
Click to expand...
Click to collapse
Yep...
1 Contacts
1 Number
Games
My Account
Ringbacks
Ringtones
Rogers Live
Shop
urMusic
And there's a Rogers splash screen when shutting off the phone, but not when turning it on.
~David said:
Yep...
1 Contacts
1 Number
Games
My Account
Ringbacks
Ringtones
Rogers Live
Shop
urMusic
And there's a Rogers splash screen when shutting off the phone, but not when turning it on.
Click to expand...
Click to collapse
The rogers spash screen is there when turning on the phone as well. It's part of the boot animation.
JSLEnterprises said:
The rogers spash screen is there when turning on the phone as well. It's part of the boot animation.
Click to expand...
Click to collapse
Oh hey, you're right. I never noticed.
It only appears for about a second or two before the "Quietly Brilliant" screen.
ummm it doesnt matter which ROM your on... ur still going to get charged for tethering. ATT looks and sees whats connected to their netwok (ie a PC) and will see you're tethering. As far as 3g/4g toggles, wait like 2 weeks for some custom ROMS.
Can AT&T peek into a custom ROM like say CM9?
Sent from my SAMSUNG-SGH-I717 using XDA Premium HD app
Att wont know if you have a phone from another carrier and its rooted. I am using a xperia and samsung SII and thats how it is.
MEGABYTEPR said:
Just a quick question for you HOX Rogers owners out there, does the rogers version include any Rogers bloatware? or splash screens?
Click to expand...
Click to collapse
The thing about the bloatware is it can be disabled in settings-apps under "all" tab which is nice if you don't want them loading and updating all of the time, but they still take up space.
For those that don't know, I didn't when I first found this out, you have to first uninstall any updates an app may have before the option to disable it shows up.
kevina90 said:
ummm it doesnt matter which ROM your on... ur still going to get charged for tethering. ATT looks and sees whats connected to their netwok (ie a PC) and will see you're tethering. As far as 3g/4g toggles, wait like 2 weeks for some custom ROMS.
Click to expand...
Click to collapse
Is this true? I'm thinking about buying an unlocked Rogers HOX to tether, but I don't want to do it if they are just going to charge me the tethering fee.
Anyone using a Rogers on AT&T?
methodz said:
Is this true? I'm thinking about buying an unlocked Rogers HOX to tether, but I don't want to do it if they are just going to charge me the tethering fee.
Anyone using a Rogers on AT&T?
Click to expand...
Click to collapse
If you don't go crazy with tethering then they won't bang you for it. Yes, I briefly used the rogers rom and it unlocked tethering as well as gave the option to turn off lte, however I have gone back to the updated att rom 1.82 and hacked the stock tethering app to work just fine. This rom is ultra smooth compared to the Asian or Rogers rom.
Sent from my HTC One X using Tapatalk 2
powerwagon said:
If you don't go crazy with tethering then they won't bang you for it. Yes, I briefly used the rogers rom and it unlocked tethering as well as gave the option to turn off lte, however I have gone back to the updated att rom 1.82 and hacked the stock tethering app to work just fine. This rom is ultra smooth compared to the Asian or Rogers rom.
Sent from my HTC One X using Tapatalk 2
Click to expand...
Click to collapse
Nice, is this method in the dev forum?
Edit: NVM saw it
methodz said:
Nice, is this method in the dev forum?
Edit: NVM saw it
Click to expand...
Click to collapse
I believe that's where I found it. Beware, you can't go back to a past build after updating to the latest att leaked rom. That doesn't bother me because it's so much smoother for me, but just giving you a heads up. Search for sqlite editor...that's what I used to edit the proper files for att hot spot to work. I'll look for the thread and post if I find it.
Sent from my HTC One X using Tapatalk 2

T-mobile 4g Radio

OKAY so I decided to update this thread:
There are two versions of the One X. One with aws bands and one without. I have a device without AWS (I am about 80 % sure). There are reports of people getting 4g on AWS with the Rogers Version as of now, and more testers need to check it out as it could still be possible on ATT.
This flash here theoretically could enable the One X radio to lach onto AWS (The radios here are for the One S Ville.)
http://ville.giev.de/?page_id=42
I have flashed all three, and although I did not get 4g, I got faster ping and a near immediate connection onto T-mobile. To all the people saying this will "brick" the phone, it does not and you have nothing to worry. But as always make sure to do a backup. The radio hacks for the Skyrocket/Note were also based on flashing the Galaxy S2 radio directly on top. This should work the same.
I'm interested in this as well. What does is involved and the risk? I don't have warranty on my phone, so I'm a little bit leery in being first.
ver2go said:
I'm interested in this as well. What does is involved and the risk? I don't have warranty on my phone, so I'm a little bit leery in being first.
Click to expand...
Click to collapse
if your rooted ull should be fine just make a back up of ur current set up. this is just a clockwork flash, it may not even flash, but if it does then there's a high chance of 4g.
i've done radio hacks before for the droid 3/skyrocket/note all from a similar concept. ex. flashing the t-mobile galaxy s2 radio on the note, to enable 4g.
if anyone could provide me with a better solution for an unlock i am sure i can get this to work. seems that the htc unlocker server is down right now
it's the same thing as flashing different radios via clockwork posted in the One X android dev forum
I'll give it a try, hopefully it won't mess anything up. So I just flash the radio in recovery. If no good, I just flash the correct radio again?
There is a one click no HTC Dev bootloader unlock in the Dev forum.
http://forum.xda-developers.com/showthread.php?t=1734558
---------- Post added at 07:57 PM ---------- Previous post was at 07:25 PM ----------
I flashed:
Radio from RUU_Ville_U_HTC_Europe_1.78.401.2 [Recommended] (update by rhcp)
0.16.31501S.17_2_10.23.31501S.10L
From your link. It flashed correctly. The phone on data and voice still works. I confirmed the version in Settings is not my original:
0.17.32.09.12_10.86.32.08L
I'm still on Edge, but I'm in a crappy cell area, so still not certain if radio or my area. I might give the:
Radio from Stock T-Mobile US (update by rhcp)
0.16.31501S.02_10.18.31501S.08L
Radio a try too.
good to hear no negative results got my phone unlocked so i will be testing tonight. also do u guys have the newer sims or older ones?
I have an older sim I believe. It is one that came from an activation kit I bought off ebay. I tried the T-Mobile radio and same results, still on Edge, but still could be my location.
What in gods name are you guys doing! ? Are you trying to brick your phones? It's already been confirmed that the hardware on this phone does not support the proper bands for T-Mobile 3g!
seh6183 said:
What in gods name are you guys doing! ? Are you trying to brick your phones? It's already been confirmed that the hardware on this phone does not support the proper bands for T-Mobile 3g!
Click to expand...
Click to collapse
Prove it. Why would the phone soc be any different than the one s one.
Sent from my HTC One X using xda premium
ECEXCURSION said:
Prove it. Why would the phone soc be any different than the one s one.
Sent from my HTC One X using xda premium
Click to expand...
Click to collapse
It's not just the SOC that determines hardware compatibility. There are various radio amplifiers and filters which are tuned to the specific frequencies that the phone is likely to encounter. If a phone is going to be sold in multiple markets, sometimes the hardware filters are set up for all frequencies and some are disabled via software, but often times this is not the case.
It's not impossible that a radio reflash can make it work, though highly improbable.
sassafras
Interested in this. There might be better luck flashing the tmo radio since I don't think any European operators use AWS bands, correct me if I'm wrong.
Can anyone explain why flashing this radio from a different device won't brick our phones?
tspx23 said:
good to hear no negative results got my phone unlocked so i will be testing tonight. also do u guys have the newer sims or older ones?
Click to expand...
Click to collapse
I have a tmobile one s, but i also have the one from att and i am so interested on using this phone over tmobile 4g let me know if i can of help. I am using my micro sim that came with the one s and i am getting edge (asume its the latest from tmobbile 4g mucro sim. I am on 1.85 rooted but i did not unlock. though i am sure we can flash through CWM. any ways i am sure there is a way out to get 3g or 4g on the one x on tmobile did not find the way yet.
flashed both of the t-mobile modems no luck for me either, although my ping is significantly higher and connects to t-mobile a LOT quicker.
does anyone know how to edit the LTE settings. it is odd but for most ATT LTE phones they have the 1700mhz frequency i think it would be a matter of just defaulting that....
the radios also show up in my baseband so i have successful flashes
EDIT: one more thing, before i was not able to use data at all considering i had the newer t-mobile sims but now data works but on edge speed.
danada said:
Interested in this. There might be better luck flashing the tmo radio since I don't think any European operators use AWS bands, correct me if I'm wrong.
Can anyone explain why flashing this radio from a different device won't brick our phones?
Click to expand...
Click to collapse
it's just a file in your system. it could potentially brick your phone but you can always get into recovery and restore. which is why i stated you should create a back up of your device before trying it out.
however, i was fairly certain it wouldn't do that because the internals of the One S/One X are nearly identical, they both share the same processor and most likely similar (if not same, radios).
either way, the the radios work, getting me higher ping, and working data without having to switch out my sim for an older one, hope there is a way to activate the 1700 band !
http://www.gsmarena.com/htc_one_x_at&t-4614.php
EDIT 2: apparently there are two models of the ATT One X/XL one with the 1700 band and one without
tspx23 said:
flashed both of the t-mobile modems no luck for me either, although my ping is significantly higher and connects to t-mobile a LOT quicker.
does anyone know how to edit the LTE settings. it is odd but for most ATT LTE phones they have the 1700mhz frequency i think it would be a matter of just defaulting that....
the radios also show up in my baseband so i have successful flashes
EDIT: one more thing, before i was not able to use data at all considering i had the newer t-mobile sims but now data works but on edge speed.
Click to expand...
Click to collapse
Likely the software has been changed to support T-Mobile, but the hardware (filters, amplifiers, etc) are non-existent, so you'll never get actual 1700 MHz AWS support.
Of course, this is just a 50,000 foot view perspective without actually trying it myself.
sassafras
sassafras_ said:
Likely the software has been changed to support T-Mobile, but the hardware (filters, amplifiers, etc) are non-existent, so you'll never get actual 1700 MHz AWS support.
Of course, this is just a 50,000 foot view perspective without actually trying it myself.
sassafras
Click to expand...
Click to collapse
you might be right about this one but there are certain One X/XL's that do have the 1700 band found out through some searching and trying to figure out the reason behind it.
If that's correct.... the people with the 1700 band would have 4g when they flash this radio! also use *#*#4636#*#* to change network type to lte/gsm
--- for other phones though like the Skyrocket/Note they were directly compatible with T-mobile radios.
Okay, I flashed the Tmo One S radio and did not receive a brick. What I did receive is a not-so-good connection that will switch between HSPA+ and 3G quite often.
I don't have a WIND sim to test with, but I tried running AT commands on my phone and they don't seem to be working. I tried doing a network scan with AT+COPS=? waited forever and had nothing displayed.
Strange...
--edit--
Rebooted and ran the commands again. Still don't see any AWS carriers.
uid=0 [email protected]:/ # +COPS: (1,"CAN Rogers Wireless Inc.","ROGERS","302720",7
),(2,"ROGERS","","302720",2),(1,"CAN Rogers Wireless Inc.","ROGERS","302720",0),
(1,"","","302220",2),(1,"","","302610",2),(1,"","","302610",7),(1,"","","302220"
,7),,(0,1,2,3,4),(0,1,2)
Click to expand...
Click to collapse
danada said:
Okay, I flashed the Tmo One S radio and did not receive a brick. What I did receive is a not-so-good connection that will switch between HSPA+ and 3G quite often.
I don't have a WIND sim to test with, but I tried running AT commands on my phone and they don't seem to be working. I tried doing a network scan with AT+COPS=? waited forever and had nothing displayed.
Strange...
--edit--
Rebooted and ran the commands again. Still don't see any AWS carriers.
Click to expand...
Click to collapse
Don't you need a wind sim to connect im pretty sure the Canadian version will work on aws
Confirmed on my end that even with the T-Mobile radio, I'm not getting HSPA+. Even when I drove by the Moscone center where 1900Mhz was refarmed during Apple's WWDC (maybe it was just that day?). I was hoping this would be like the Note and Rocket where I can flash different radios.
Any other new phone capable of this? The S III? If not, I may have to either wait for 1900MHz refarm or switch to Straight Talk.
ver2go said:
Confirmed on my end that even with the T-Mobile radio, I'm not getting HSPA+. Even when I drove by the Moscone center where 1900Mhz was refarmed during Apple's WWDC (maybe it was just that day?). I was hoping this would be like the Note and Rocket where I can flash different radios.
Any other new phone capable of this? The S III? If not, I may have to either wait for 1900MHz refarm or switch to Straight Talk.
Click to expand...
Click to collapse
Picking up an att s3 today to test it out. Most likely there's two versions of one x one with aws and one without. I know mine doesn't though.
tspx23 said:
Don't you need a wind sim to connect im pretty sure the Canadian version will work on aws
Click to expand...
Click to collapse
I'm not exactly sure of this one.
If someone is willing to let me cut up their WIND sim (or lend me their WIND microsim), I'll re-flash the tmo radio and meet you somewhere to test it (Toronto, please).
~dan
-----edit-----
Just popped in an old WIND sim that I used to test AWS connectivity at first. Saw WIND Away with the standard radio, and after flashing the Tmo radio I see WIND Away and AT&T (AT+COPS=? shows Rogers, ATT, Telus, Bell).
I live by the lake, that would explain why ATT shows up.
-----edit again-----
Check this out http://imgur.com/Nb984,rUvM6. Not using the One S radio...

att 4g lie

i have mine on att "yeah i know edge ony but wait its a lie i have 4g sometimes and want to know why or how i have screen shots too wont stay on long
dont tell me phone cant cuz it did it "a cat cant bark fact" "htc sensation went 4g on att fact"
so i dont think htc changed hardwear in phones but think they put soft some kind of lock on it for tmob can we unlock this phone
craven667 said:
i have mine on att "yeah i know edge ony but wait its a lie i have 4g sometimes and want to know why or how i have screen shots too wont stay on long
dont tell me phone cant cuz it did it "a cat cant bark fact" "htc sensation went 4g on att fact"
so i dont think htc changed hardwear in phones but think they put soft some kind of lock on it for tmob can we unlock this phone
Click to expand...
Click to collapse
No.
There is no software lock.
It's different hardware.
Non-T Mobile ROMs are affected the same way, using pure AOSP or mods thereof, which hav eno input from T Mobile whatsoever.
Actually, if you take a look at the radio thread, apparently the hardware is the same but the modems are different (something I learned only recently). I have an Australian/Canadian edition of the Sensation which runs on AT&T 4g and I posted my modems in that thread. YMMV though, don't blame anyone if you brick your phone.
You might have roamed into T-Mobile 4G momentarily!!! Just saying.
http://www.gottabemobile.com/2012/02/23/will-t-mobile-usas-4g-lte-network-allow-for-att-4g-roaming/
And it seems AT&T may be using AWS spectrum for 4G (not LTE) in some market. Which is what T-Mobile use everywhere.

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