Develop Bugs

[Q] Is T-Mobile version equal to AT&T version?

I got a T-Mobile HTC One (M8) only to discover there's no coverage where I am. I already rooted, S-OFFed, TWRPed, and transferred all my files, history, texts, configured it, etc. so I really want to just keep the phone, pay it off, and switch to AT&T, but is there anything I'd lose out on? Are there any differences between the phones themselves (limiting radio differences, etc.) that I should know about? Will the phone perform equally on AT&T's network?
Thanks!

No differences as far as I know. Just that the carrier is different obviously.
Sent from my Nexus 7 using Tapatalk

I'm pretty sure the AT&T version has more LTE bands? I could be totally wrong though...
From the GSMArena spec sheet
LTE 700 / 850 / 1700 / 1800 / 1900 / 2100 / 2600 - AT&T
LTE 700 / 1700 / 2100 - T-Mobile
Click to expand...
Click to collapse

Cuppeerr said:
I'm pretty sure the AT&T version has more LTE bands? I could be totally wrong though...
From the GSMArena spec sheet
Click to expand...
Click to collapse
Do you know if that's the sort of thing that you can flash a radio update to fix? or is that a hardware issue (lacking hardware)?

quinxy said:
Do you know if that's the sort of thing that you can flash a radio update to fix? or is that a hardware issue (lacking hardware)?
Click to expand...
Click to collapse
It's a hardware thing.

Just to follow up on my own post...
I did some research and the frequencies which are not in a T-Mobile HTC One (M8) when moved to AT&T appear to be used by non AT&T companies who are likely roaming partners of AT&T (e.g., Rogers in Canada, U.S. Cellular in the West (I think)). So, doesn't seem like a huge negative, unless roaming quite a bit and/or going to Canada.

Reception on M8 Google Play Edition

I had a Nexus 5 but had to return it because I could never hold or keep an LTE signal while my other phones all had no problem holding two bars of ATT LTE. Has anyone had LTE reception issues like I experienced with the Nexus 5 but on their HTC One GPE?

giper54 said:
I had a Nexus 5 but had to return it because I could never hold or keep an LTE signal while my other phones all had no problem holding two bars of ATT LTE. Has anyone had LTE reception issues like I experienced with the Nexus 5 but on their HTC One GPE?
Click to expand...
Click to collapse
Lots of people have reported this as well, and yes, I do have issues like yours

Sir-Fix-a-Lot said:
Lots of people have reported this as well, and yes, I do have issues like yours
Click to expand...
Click to collapse
Are you having reception issues with the M8 GPE or Nexus 5 on AT&T?

giper54 said:
Are you having reception issues with the M8 GPE or Nexus 5 on AT&T?
Click to expand...
Click to collapse
I have an unlocked T-Mo M8 on AT&T
I realize I am missing some bands that I need for AT&T, so i've tried the GPE conversion, and tried loading an AT&T RUU which wouldnt even launch. I've tried T-Mo, AT&T, and GPE radios trying to fix it, or add the missing bands, but I still have issues. Toggling data or switching from LTE to 3g and back will restore LTE.
I've read and read and read, and all I see is issues with reception and LTE no matter what model it is. I'm at a loss as to what is going on. I haven't tried going back to Sense, I use SlimKat.

I have had an AT&T model on AT&T and reception has been good for me. I returned twos deals because of build issues so I have been thinking about getting a GPE instead. Shockingly the S5 I have has great reception. Better than my 5s. I just get worried that buying a GPE model will have some missing bands or never receive radio updates from AT&T.

giper54 said:
I have had an AT&T model on AT&T and reception has been good for me. I returned twos deals because of build issues so I have been thinking about getting a GPE instead. Shockingly the S5 I have has great reception. Better than my 5s. I just get worried that buying a GPE model will have some missing bands or never receive radio updates from AT&T.
Click to expand...
Click to collapse
The GPE is a full world phone, it has LTE700 (B17), LTE850 (B5), LTE1700/2100 (B4), LTE1800 (B3), LTE2600 (B7), LTE1900 (B2)
More info here:
http://pdadb.net/index.php?m=specs&id=5985&c=htc_one_m8_2014_lte-a_google_play_edition_htc_m8
The GPE will receive it's updates straight from Google, using the GPE radio, but you can always S-Off and try the other ones. But like I said before, I've seen plenty of people who complain of the same issue regardless of model and what it's running. Really hope someone, or HTC, or Google can figure it out. Sometimes I'll drop all the way down to G, or Edge, and toggling it will bring LTE back, and I can't find ANYTHING to help me out short of trying different radios.
---------- Post added at 06:20 PM ---------- Previous post was at 06:16 PM ----------
GPE radio seems to work best for me

Beautiful reception using the developer edition on AT&T.

I found a nice used GPE on swappa but I won't be able to return if their are reception issues. I am going to go through Amazon $20 cheaper than AT&T and free returns.

MattMJB0188 said:
Beautiful reception using the developer edition on AT&T.
Click to expand...
Click to collapse
Really wish I could say the same. WiFi is janky as well, so I'm just gonna relate these issues to AOSP, and I'm missing bands. I'll try going back to Sense, or maybe the GPE conversion again.

Sir-Fix-a-Lot said:
Really wish I could say the same. WiFi is janky as well, so I'm just gonna relate these issues to AOSP, and I'm missing bands. I'll try going back to Sense, or maybe the GPE conversion again.
Click to expand...
Click to collapse
Nope. No problems at all. And I am very picky about reception on cell phones lol. I find the developer edition (stock) works amazingly well on AT&T.
Doesn't the GPE support all AT&T and T-Mobile's frequencies?

MattMJB0188 said:
Nope. No problems at all. And I am very picky about reception on cell phones lol. I find the developer edition (stock) works amazingly well on AT&T.
Doesn't the GPE support all AT&T and T-Mobile's frequencies?
Click to expand...
Click to collapse
Yes, the GPE has all the bands it needs for both carriers, only the T-Mo model is missing some.

Sir-Fix-a-Lot said:
Yes, the GPE has all the bands it needs for both carriers, only the T-Mo model is missing some.
Click to expand...
Click to collapse
If the phone has all the bands, then something else may be causing the OP's signal to be flaky. The only T-Mobile bands that is missing would be UMTS Band 4 (AWS HSPA). They are doing away with it anyway.

MattMJB0188 said:
If the phone has all the bands, then something else may be causing the OP's signal to be flaky. The only T-Mobile bands that is missing would be UMTS Band 4 (AWS HSPA). They are doing away with it anyway.
Click to expand...
Click to collapse
This is my first HTC since the Nexus One, I'm used to Samsung. Do you know if there is a dialer code like a Samsung has to check the bands I have enabled or not enabled? Or any other way to check?
Sent from my One M8 using Tapatalk

Sir-Fix-a-Lot said:
This is my first HTC since the Nexus One, I'm used to Samsung. Do you know if there is a dialer code like a Samsung has to check the bands I have enabled or not enabled? Or any other way to check?
Sent from my One M8 using Tapatalk
Click to expand...
Click to collapse
The GPE supports LTE bands 4 & 17, so it is fully compatible with both AT&T and T-Mobile LTE.

MattMJB0188 said:
The GPE supports LTE bands 4 & 17, so it is fully compatible with both AT&T and T-Mobile LTE.
Click to expand...
Click to collapse
I have an unlocked Tmo on AT&T. I've flashed the GPE radio and looking for a way to check if I've enabled any hidden bands. Sorry to the OP for asking this in his thread.
Sent from my One M8 using Tapatalk

Sir-Fix-a-Lot said:
I have an unlocked Tmo on AT&T. I've flashed the GPE radio and looking for a way to check if I've enabled any hidden bands. Sorry to the OP for asking this in his thread.
Sent from my One M8 using Tapatalk
Click to expand...
Click to collapse
Hello Sir-Fix-a-Lot,
could you please share the GPE radio img file for me?
And is flashing radio must be under fastboot oem rebootRUU?
thanks,

heartready said:
Hello Sir-Fix-a-Lot,
could you please share the GPE radio img file for me?
And is flashing radio must be under fastboot oem rebootRUU?
thanks,
Click to expand...
Click to collapse
It's in this thread:
http://forum.xda-developers.com/showthread.php?t=2736921
There is a recovery flashable version and an .img version to be fastboot flashed in rebootRUU mode. Obviously the recovery flashable version would be easier.
Remember you need to be S-Off to flash a radio from a different model.

Sir-Fix-a-Lot said:
It's in this thread:
http://forum.xda-developers.com/showthread.php?t=2736921
There is a recovery flashable version and an .img version to be fastboot flashed in rebootRUU mode. Obviously the recovery flashable version would be easier.
Remember you need to be S-Off to flash a radio from a different model.
Click to expand...
Click to collapse
:good::good:
thank you for your quick answer, trying now.
I'm using a rooted stock recovery, so I have to use fastboot flash way. ha

heartready said:
:good::good:
thank you for your quick answer, trying now.
I'm using a rooted stock recovery, so I have to use fastboot flash way. ha
Click to expand...
Click to collapse
Remember you need to be S-Off and SuperCID to flash a different model's radio.

Sir-Fix-a-Lot said:
Remember you need to be S-Off to flash a different model's radio.
Click to expand...
Click to collapse
yeah. thanks for the reminder. it's S-Off already.
just done flashed. thank you again.

[Q] M8X and MetroPCS: No LTE?

Hey All,
Long story short, I got an HTC One M8 M8x (which is apparently from Taiwan?).
I got it on the cheap.
Phone starts, activates just fine. I have MetroPCS. However, I won't access LTE at all. I have tried to change the APN and everything. The model I have should have LTE.
Any thoughts on how to fix it?

SIM Card
I also had to chop off part of my SIM to fit. Is it possible I removed the LTE portion of the SIM?

That device has these bands as per here: Those appear to be for a chinese region
http://m.newegg.com/Product/index?itemnumber=N82E16875502227
GSM 850 / 900 / 1800 / 1900 MHz
UMTS 850 / 900 / 1900 / 2100 MHz
LTE 800 / 900 / 1800 / 2600
Metro PCS has these bands:Tmobile Network,does not appear that specific device has the bands.
https://support.t-mobile.com/docs/DOC-4988

So...
Wonders_Never_Cease said:
That device has these bands as per here: Those appear to be for a chinese region
http://m.newegg.com/Product/index?itemnumber=N82E16875502227
GSM 850 / 900 / 1800 / 1900 MHz
UMTS 850 / 900 / 1900 / 2100 MHz
LTE 800 / 900 / 1800 / 2600
Metro PCS has these bands:Tmobile Network,does not appear that specific device has the bands.
https://support.t-mobile.com/docs/DOC-4988
Click to expand...
Click to collapse
That basically means I'm boned then right? There's literally nothing I can do (since it is hardware based).

Unfortunately it appears that way,based on what I found in that info that device will not aupport tmobile lte via metropcs towers.
admiralriker said:
That basically means I'm boned then right? There's literally nothing I can do (since it is hardware based).
Click to expand...
Click to collapse

Change Radio?
Do you think there's anyway I could just flash another radio file to change the frequencies picked up?

No not to my knowledge,they are hardcoded into device.
admiralriker said:
Do you think there's anyway I could just flash another radio file to change the frequencies picked up?
Click to expand...
Click to collapse

Wonders_Never_Cease said:
No not to my knowledge,they are hardcoded into device.
Click to expand...
Click to collapse
If I'm understanding correctly, the M8x is the same as any other GSM M8, its just a regionalization?
If so, as long as the phone is s-off, you should be able to flash a different radio and open up different freq support on LTE (in this case, a T-Mob radio). Or am I missing something? I know WNC is a lot smarter than me on this stuff, so I'm thinking I must be missing something?

Im not 100% you could very well be correct,thats why i said to my knowledge its wont work. From what I was told awhile back it is in the hardware not the firmware software.I do know for a fact on the M7 is is not able to be changed via firmware radio flashing.
Post #18 http://forum.xda-developers.com/showthread.php?t=2736921&page=2
redpoint73 said:
If I'm understanding correctly, the M8x is the same as any other GSM M8, its just a regionalization?
If so, as long as the phone is s-off, you should be able to flash a different radio and open up different freq support on LTE (in this case, a T-Mob radio). Or am I missing something? I know WNC is a lot smarter than me on this stuff, so I'm thinking I must be missing something?
Click to expand...
Click to collapse

Wonders_Never_Cease said:
Im not 100% you could very well be correct,thats why i said to my knowledge its wont work. From what I was told awhile back it is in the hardware not the firmware software.I do know for a fact on the M7 is is not able to be changed via firmware radio flashing.
Click to expand...
Click to collapse
As of Snapdragon 801 chipset, the band support is now software based. It was a new thing for me too, on this device. As previously, I was accustomed to band support always being hardware based, and telling people "no way" when they asked if you can change band support by flashing a different radio.
My understanding, all GSM M8's have identical hardware (aside from cosmetics) and can be flashed/converted to be any other variant (s-off required, of course).
The exceptions are the dual SIM M8 and (possibly) the CDMA (Sprint, Verizon) variants which may actually have different hardware (its not been clear to me, and I have yet to read anything definitive either way on this).

Link i posted for thread post #18 says user tried other variants radios and was unable to get them to work, IF this is true then they are not all software base...shrugs, who knows...lol

Wonders_Never_Cease said:
Link i posted for thread post #18 says user tried other variants radios and was unable to get them to work, IF this is true then they are not all software base...shrugs, who knows...lol
Click to expand...
Click to collapse
So this may indeed be something specific to the Taiwanese variant (not compatible with other M8 radios?).
Other folks on that same thread were able to do it on other variants (AT&T radio on T-Mob version; T-Mob radio on AT&T version) and I've seen other reports to the same effect.

It may be, they may have locked it up on chinese variant as it is a different device model than a regular m8

Wonders_Never_Cease said:
It may be, they may have locked it up on chinese variant as it is a different device model than a regular m8
Click to expand...
Click to collapse
Yeah, I forgot the Taiwanese variant had different CPU clocking (but otherwise the same?).

Based on that post id say more than thats different....

Looking for a radio to get LTE band 2 on T-Mobile US

I have a T-Mobile branded M8 rooted, unlocked bootloader, and S-Off. I live out in the sticks and can only get 1900mhz LTE band 2 on my wife's S4 however, my M8 doesn't see band 2 because of the radio firmware.
Is there a radio firmware from another GSM M8 variant that I could flash to my T-Mobile branded M8 that would get me the 1900mhz LTE band 2?

Are you using the phone on a different carrier besides T-Mobile? If so, which carrier?
Also, Band 2 looks like its 1900 MHz, and band 4 corresponds to 1700 MHz (also known as AWS). So not clear which band you are looking for: http://en.wikipedia.org/wiki/List_of_LTE_networks

No. I am on T-Mobile US.
Sorry, I meant band 2 (1900mhz). Corrected in the OP.

barcodelinux said:
No. I am on T-Mobile US.
Sorry, I meant band 2 (1900mhz). Corrected in the OP.
Click to expand...
Click to collapse
That's really odd that the T-Mobile US variant doesn't include a band that T-Mob uses. But based on specs listed online, this is the case (doesn't support 1900 MHz Band 2 for LTE): http://www.gsmarena.com/htc_one_(m8)-6074.php
AT&T or Developer's Edition radios may be your best bet (AT&T uses 1900 for LTE).

barcodelinux said:
I have a T-Mobile branded M8 rooted, unlocked bootloader, and S-Off. I live out in the sticks and can only get 1900mhz LTE band 2 on my wife's S4 however, my M8 doesn't see band 2 because of the radio firmware.
Is there a radio firmware from another GSM M8 variant that I could flash to my T-Mobile branded M8 that would get me the 1900mhz LTE band 2?
Click to expand...
Click to collapse
Looks like you and I are in the same boat. I was dumfounded when I found out a LTE capable phone I purchased from T-Mobile is not able to get LTE due to an unsupported band.
In any case, I have a similar post over in the [Q&A] [RADIO] Q&A HTC One M8 Radio collection for different model Models/CID's. See http://forum.xda-developers.com/htc-one-m8/help/qa-htc-one-m8-radio-collection-models-t2941210/page6
One guy mentions the AT&T radio would probably work but I would lose 3G connectivity in some areas. I'm going to have to look into that a little deeper.
Please update me if you find a solution and let me know how things work out. I'll do the same.

fyrcap100 said:
One guy mentions the AT&T radio would probably work but I would lose 3G connectivity in some areas. I'm going to have to look into that a little deeper.
Click to expand...
Click to collapse
That's right. It occurred to me that the AT&T version lacks the AWS band (Band 4, or 1700/2100MHz), which T-Mob uses for HSPA+ (3G) in many areas. Its somewhat of an oddball band, meaning its not used in many places aside from T-Mob US, so its pretty rare to have this built into any radio that is not specifically T-Mob.

redpoint73 said:
That's right. It occurred to me that the AT&T version lacks the AWS band (Band 4, or 1700/2100MHz), which T-Mob uses for HSPA+ (3G) in many areas. Its somewhat of an oddball band, meaning its not used in many places aside from T-Mob US, so its pretty rare to have this built into any radio that is not specifically T-Mob.
Click to expand...
Click to collapse
What a PITA. Why didn't TMO just go ahead and put LTE Band 2 in the phone in the first place. They knew they were pushing LTE in that band so why handcuff their customers. You can't make this stuff up!
Thanks for the information you have provided. It really is eye-opening. I'm still in the buyers remorse period as far as this phone is concerned and could return it. The problem is I don't know what phone to get without spending twice the money at this point. That is unless I want to move of an iPhone (Boo!!).
What a tangled web!

redpoint73 said:
That's right. It occurred to me that the AT&T version lacks the AWS band (Band 4, or 1700/2100MHz), which T-Mob uses for HSPA+ (3G) in many areas. Its somewhat of an oddball band, meaning its not used in many places aside from T-Mob US, so its pretty rare to have this built into any radio that is not specifically T-Mob.
Click to expand...
Click to collapse
So does the developer version support the AWS band?

fastbyte27 said:
So does the developer version support the AWS band?
Click to expand...
Click to collapse
I don't know for sure but there is a 2014 article on Phandroid that states the Developer Edition is basically an unbranded version of the AT&T phone. So logic would say that if the AT&T version doesn't support it then the Developer Edition wouldn't either.
http://phandroid.com/2014/03/26/htc-one-m8-developer-edition/

fastbyte27 said:
So does the developer version support the AWS band?
Click to expand...
Click to collapse
Dev Edition does not support AWS for HSPA+ (3G), according to this: https://support.t-mobile.com/message/359612
---------- Post added at 09:28 AM ---------- Previous post was at 09:18 AM ----------
fyrcap100 said:
I don't know for sure but there is a 2014 article on Phandroid that states the Developer Edition is basically an unbranded version of the AT&T phone. So logic would say that if the AT&T version doesn't support it then the Developer Edition wouldn't either.
http://phandroid.com/2014/03/26/htc-one-m8-developer-edition/
Click to expand...
Click to collapse
That was my original understanding as well, and for the most part true. However, its been pointed out on XDA (and specs online agree) that the Dev Edition is missing LTE Band 7, which the AT&T version does support. A minor difference that won't affect most folks (AT&T doesn't use that band), but a difference nonetheless.

Got International HTC 10 on Ebay, doesn't get LTE on T-Mobile HELP

I bought a new HTC 10 on ebay and it's the unlocked international version. I didn't realize there is a US unlocked and International variants, I assumed carrier unlocked was an international variant. I'm on Tmobile which aparently uses some band that I'm not able to pick up and therefore I've been relegated to hspa for my data. Quite disappointing.
Can I S-Off and change to either Super CID or the TMobile CID and flash the radio and firmware for T-Mobile and get the phone to pick up the LTE so i can get my high speed data?
I can't find anywhere that tells me if the hardware is the same and that the radio is software configurable and therefore can activate the AWS bands with the correct radio/firmware/ruu or something of the like..
Did I totally blow it buying the int'l version of the 10 unlocked, or can I hack it to run properly on Tmobile LTE?

punkboyinsf said:
I bought a new HTC 10 on ebay and it's the unlocked international version. I didn't realize there is a US unlocked and International variants, I assumed carrier unlocked was an international variant. I'm on Tmobile which aparently uses some band that I'm not able to pick up and therefore I've been relegated to hspa for my data. Quite disappointing.
Can I S-Off and change to either Super CID or the TMobile CID and flash the radio and firmware for T-Mobile and get the phone to pick up the LTE so i can get my high speed data?
I can't find anywhere that tells me if the hardware is the same and that the radio is software configurable and therefore can activate the AWS bands with the correct radio/firmware/ruu or something of the like..
Did I totally blow it buying the int'l version of the 10 unlocked, or can I hack it to run properly on Tmobile LTE?
Click to expand...
Click to collapse
Yes you can do that. Get S-Off, change your CID and MID and flash US Unlocked.

xunholyx said:
Yes you can do that. Get S-Off, change your CID and MID and flash US Unlocked.
Click to expand...
Click to collapse
Very good to know. Follow up. Is this easy enough to reverse if I need to use my warranty?

punkboyinsf said:
Very good to know. Follow up. Is this easy enough to reverse if I need to use my warranty?
Click to expand...
Click to collapse
Yes, the same process but in reverse.

Tarima said:
Yes, the same process but in reverse.
Click to expand...
Click to collapse
OK. so I did all that and am now running unlocked us firmware. I think I'm having the LTE reception issues I had read about. flashing the T-Mobile ruu should fix that right?
Ps
Thanks a million for the prompt replies BTW. I've had this phone for a couple minutes and I feel good to finally get things working like they should be.

punkboyinsf said:
OK. so I did all that and am now running unlocked us firmware. I think I'm having the LTE reception issues I had read about. flashing the T-Mobile ruu should fix that right?
Ps
Thanks a million for the prompt replies BTW. I've had this phone for a couple minutes and I feel good to finally get things working like they should be.
Click to expand...
Click to collapse
I can't vouch for the ruu fixing your lte issues. I've seen mixed reporting around for stuff like this. I would try it and see if it works.

punkboyinsf said:
OK. so I did all that and am now running unlocked us firmware. I think I'm having the LTE reception issues I had read about. flashing the T-Mobile ruu should fix that right?
Ps
Thanks a million for the prompt replies BTW. I've had this phone for a couple minutes and I feel good to finally get things working like they should be.
Click to expand...
Click to collapse
Well, T-mobile has been doing upgrades on the network and there has been a lot of space weather causing power outages and hiccups in other electronic devices. My home WiFi has been connecting and dropping left and right! I too have the T-mobile version of the HTC 10 but I did unlock the SIM and did the full conversion to the North American unlocked developer version and it has been absolutely issue free!! You might want to double check to see if the radios in the International version are using band 12,and band 4 for LTE... I lost my LTE after a long run doing the same thing with the original HTC One M7

I feel your pain
punkboyinsf said:
I bought a new HTC 10 on ebay and it's the unlocked international version. I didn't realize there is a US unlocked and International variants, I assumed carrier unlocked was an international variant. I'm on Tmobile which aparently uses some band that I'm not able to pick up and therefore I've been relegated to hspa for my data. Quite disappointing.
Can I S-Off and change to either Super CID or the TMobile CID and flash the radio and firmware for T-Mobile and get the phone to pick up the LTE so i can get my high speed data?
I can't find anywhere that tells me if the hardware is the same and that the radio is software configurable and therefore can activate the AWS bands with the correct radio/firmware/ruu or something of the like..
Did I totally blow it buying the int'l version of the 10 unlocked, or can I hack it to run properly on Tmobile LTE?
Click to expand...
Click to collapse
Unfortunately HTC enabled/disabled certain LTE bands in the modem firmware depending on the region. The unlocked international doesn't play nice with T-mobile AWS. Flashing the RUU doesn't change the NV values in the modem, so you'll still be stuck with HSPA for the most part. I'm in AZ, and I can get band 12 and sometimes the non-AWS band 4, but neither are super fast. The snapdragon 820 does support all the necessary bands, they just need to be unlocked. We have the issue that qualcomm has put protection on the LTE firmware, so the old way of using QXDM/QPST doesn't work like it did on the 810 and earlier chipsets. There's some other threads on here that thing a custom kernel might open up the possibility of using the QXDM to edit NV values to unlock the necessary bands.