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[Q] Using 4G on Sprint HTC One when GSM is enabled

Hello,
I recently acquired from ebay a used Sprint HTC One M7 for cheap because the guy couldn't unlock it.
I followed all the tutorials and guides here, and got the phone unlocked, TWRP recovery and SuperSU flashed, S-OFF, and a custom rom (Viper) flashed on it successfully.
I am from France and my network operator is Free.fr. I used both the *#*#4636#*#* and the Mobile settings to enable GSM and the phone, SMS, and 3G data are all working properly.
However, my operator allows for 4G LTE as well and I would like to use it if possible, while retaining the use of the Phone itself (making calls, texts etc).
The way it works for Free.fr is that I have to login on their website, and enable 4G manually. The server will then check if my phone has 4G LTE compatibility and enable it if it does, but everytime I try it tells me my phone is not 4G ready.
Is there anyway to do this? A guide or tutorial out there perhaps?
edit: more info:
It seems I need 2600 MHz frequency for 4G to work with my operator, could it be that the Sprint version cannot handle this? Any solutions?

m2smoe said:
Hello,
I recently acquired from ebay a used Sprint HTC One M7 for cheap because the guy couldn't unlock it.
I followed all the tutorials and guides here, and got the phone unlocked, TWRP recovery and SuperSU flashed, S-OFF, and a custom rom (Viper) flashed on it successfully.
I am from France and my network operator is Free.fr. I used both the *#*#4636#*#* and the Mobile settings to enable GSM and the phone, SMS, and 3G data are all working properly.
However, my operator allows for 4G LTE as well and I would like to use it if possible, while retaining the use of the Phone itself (making calls, texts etc).
The way it works for Free.fr is that I have to login on their website, and enable 4G manually. The server will then check if my phone has 4G LTE compatibility and enable it if it does, but everytime I try it tells me my phone is not 4G ready.
Is there anyway to do this? A guide or tutorial out there perhaps?
edit: more info:
It seems I need 2600 MHz frequency for 4G to work with my operator, could it be that the Sprint version cannot handle this? Any solutions?
Click to expand...
Click to collapse
Yeah :/ the Sprint HTC One only supports the 1900MHz for LTE. There aren't any solutions afaik, unless you might want to do a hardware mod, and doing hardware mods on an One is near-impossible.. so you're out of luck.

StormyNight said:
Yeah :/ the Sprint HTC One only supports the 1900MHz for LTE. There aren't any solutions afaik, unless you might want to do a hardware mod, and doing hardware mods on an One is near-impossible.. so you're out of luck.
Click to expand...
Click to collapse
Ah well, that's alright, at the price I got it for it's still worth it even without 4G. Thanks for the reply!

m2smoe said:
Ah well, that's alright, at the price I got it for it's still worth it even without 4G. Thanks for the reply!
Click to expand...
Click to collapse
Hi, could you share your experience of sim unlock the device?
my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.
now iin Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could you told me your way of doing the sim unlock? Thanks.

laofan said:
Hi, could you share your experience of sim unlock the device?
my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.
now iin Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could you told me your way of doing the sim unlock? Thanks.
Click to expand...
Click to collapse
I did exactly what you did and I had signal. I am from France so I don't know about AT&T though. With my French operator it works fine now.

m2smoe said:
I did exactly what you did and I had signal. I am from France so I don't know about AT&T though. With my French operator it works fine now.
Click to expand...
Click to collapse
That is weired. thanks for your reply though.

[Q] S-off and sim unlock but Still NOT signal

my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. following this guide ( http://forum.xda-developers.com/showthread.php?t=2586704 ) Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.(
now in Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could any body help with this?

finally get it connect to gsm but the 4.1.2 rom camera is not working. When I flash back to 4.4,, non of these rom could recognize gsm.....
Could anyone help?

laofan said:
my phone is on 1.57 hboot. I s-off it and RUU to 1.19 firmware. Android 4.1.2. following this guide ( http://forum.xda-developers.com/showthread.php?t=2586704 ) Then I install latest TWRP and Super SU 2.0
Then I download the "sprint htc one sim unlock helper" , select sim unlock.
phone reboot. select " GSM/WCDMA/LTE auto" in *#*#4636#*#*"
Now when I insert my AT&T sim card. it pop up to select carreir, I choose "AT&T", I also choose "GSMUMTS only" in network moode. Also set up ATT APN.(
now in Phone indentity, I could see my phone number,
But there is no signal for the phone at all...
Could any body help with this?
Click to expand...
Click to collapse
I think you might have to downgrade your radio. I used the same thread to unlock mine. I put BadBoyz rom on mine and then downgraded my radio to 1.00.20.0315. That solved all the connection issues for me. Also you have to pick WCDMA preferred after you go to *#*#4636#*#*"

Chunky McNasty said:
I think you might have to downgrade your radio. I used the same thread to unlock mine. I put BadBoyz rom on mine and then downgraded my radio to 1.00.20.0315. That solved all the connection issues for me. Also you have to pick WCDMA preferred after you go to *#*#4636#*#*"
Click to expand...
Click to collapse
It does not work on my AT&T sim, but works on T-mobile sim....
I have to use latest radio for call sound to work properly,especially in bad boyz rom.

[Guide] Sprint Htc One Sim Unlock | HBOOT 1.57 | Works with AT&T

First off, I had absolutely no luck with any of the other methods mentioned on the forum, so I decided to write up how I (finally) managed to get my HTC one to work with an AT&T GoPhone sim card.
1.) Get Sunshine for S-Off, I wasted 3 days trying to find a way around paying for it, but finally caved.
2.) SuperCID: fastboot oem writecid 11111111
3.) Flash the RUU from this guide: http://forum.xda-developers.com/showthread.php?t=2586704 or here: http://click.xda-developers.com/api/click?format=go&jsonp=vglnk_142045584221011&key=f0a7f91912ae2b52e0700f73990eb321&libId=fa116373-28cf-4bc7-9e8a-f2fe6623deb1&loc=http%3A%2F%2Fforum.xda-developers.com%2Fshowthread.php%3Ft%3D2586704&v=1&out=http%3A%2F%2Fwww.androidfilehost.com%2F%3Ffid%3D22979706399752930&ref=http%3A%2F%2Fforum.xda-developers.com%2Fsprint-htc-one%2Fgeneral&title=%5BComplete%20guide%5D%20to%20SIM%20unlock%20your%20HTC%20One%20%E2%80%A6%20%7C%20Sprint%20HTC%20One%20%7C%20XDA%20Forums&txt=Sprint_HTC_One_m7wls_1.29.651.10_RUU.zip
- I had to fastboot oem rebootRUU then fastboot flash zip RUU.zip
- Check to be sure HBOOT is downgraded to 1.44
4.) Be sure to root the device, either using custom recovery or TWRP app from play store
5.) Run the sim unlock helper available here: http://forum.xda-developers.com/attachment.php?attachmentid=2983865&d=1414183159
6.) Here's the one part that isn't widely mentioned for the specific issue I ran into with this unlock: You need a sprint sim card to "trick" the phone into searching for networks.
- Type in *#*#INFO#*#* (*#*#4636#*#*) and change your network to WCDMA preferred
- Be sure that the Sprint sim card is in the phone
- Go to Settings -> Mobile Data -> Network Mode and set to GSM/UMTS Only (You should have no signal or bars with X above them)
- Click on Available GSM networks -> Select Automatically
- Switch the SIM for the AT&T Sim (It will show 'no sim warning') while it is searching and then click on Available GSM networks -> Search networks
- Select AT&T (or Maritime)
- Device will register, however, the settings are lost on restart and I haven't managed to get data yet. (If anyone can help with this, I'd greatly appreciate it!)
UPDATE: I have managed to get data working. After traveling from my suburb to the city, I lost signal and discovered that a window pops up asking to connect to network. I chose ATT again, which reconnected with data.

Any chance you could post a video on how to do it?
I'm a complete noob and dont understand half of the stuff your saying.

[Q] Sprint M7 was previously on Tmob, Trying to flash back to Sprint, now no service.

Hopefully someone can give me some guidance. I bought a phone locally from a facebook classified group. It has a clean ESN and said "ready for activation" on sprints network when checked. The phone has been unlocked and it used on a different network, but was supposed to be flashed back and ready for me to activate with sprint, and all I'd have to do is pop in the Sim card for 4g and activate it.
The phone has no signal at all, so even though I can activate it online through my account, obviously I can not use it. I'm afraid that when it comes to this end of android, I know just enough to get myself in trouble, but not enough to fix my problem on my own!
Here is where I stand.
-Phone MID was changed by seller to Tmobile MID, I had to change it back to sprint MID so I could flash firmware and RUU.
-When read with QPST or CDMA workshop, phone is NV only, not RUIM, which is as it should be.
-Once RUUed, the phone has no service. It is unactivated, but usually an unactivated phone will still show signal. It has a x over the bars. This does not change if I change any settings in *#*#4636#*#*
-I flashed a custom rom (lollipop nocturnal edition) so I could get access to the APN settings. Once the rom was loaded, all I had to do was set roaming options to automatic, and my phone showed signal, albeit it now thinks it is roaming all the time I set up the sprint APN in APN menu anyways, just to make sure it was in there. Phone still shows roaming. PRL = 1
-When I restore back to the image made immediately after RUU, no signal again. PRL shows as a sprint PRL 55xxx. I can't update profile or PRL even on wifi.
MEID MSID MDN and IMEI all appear to be good.
Android Version 5.0.2
Baseband 1.01.20.1225
Kernel 3.4.10
Build LRX22C.H3
I have access to QPST and the free version of CDMA workshop. Phone is DIAG enabled, rooted, TWRP recovery, @ off and unlocked
hboot 1.60.000
os 6.16.651.2
TIA for any help anyone can give.

What about using ruu?

HTC M8 Accidentally Clicked USA Radio Band, please help. Now shows No Service

I have HTC M8 831c, phone is S-Off and Super CID 11111111, While checking for radio bands by dialing the code *#*#4636#*#* I accidentally clicked the radio bands option and selected USA Band, now the phone is stuck in USA bands and I cannot revert back to the global bands. Please help me how to make it working again. Here are the details
M8_WHL PVT SHIP S-OFF
CID-11111111
HBOOT- 3.19.0.0000
Radio-1.09.20.0209
OpenDSP-v48.2.2-00564-M8974_F0.1211
OS-4.25.651.18
Aug 4 2015,19:05:23.90022323
Problem: No service
Solutions Tried: Factory resetting didn't work

Please help
Engr_Junaid said:
I have HTC M8 831c, phone is S-Off and Super CID 11111111, While checking for radio bands by dialing the code *#*#4636#*#* I accidentally clicked the radio bands option and selected USA Band, now the phone is stuck in USA bands and I cannot revert back to the global bands. Please help me how to make it working again. Here are the details
M8_WHL PVT SHIP S-OFF
CID-11111111
HBOOT- 3.19.0.0000
Radio-1.09.20.0209
OpenDSP-v48.2.2-00564-M8974_F0.1211
OS-4.25.651.18
Aug 4 2015,19:05:23.90022323
Problem: No service
Solutions Tried: Factory resetting didn't work
Click to expand...
Click to collapse
Anyone please help, i want to get my phone working again

You can't select "Automatic" in those exact settings?

No
mcwups1 said:
You can't select "Automatic" in those exact settings?
Click to expand...
Click to collapse
There is no Automatic option available, there are only four options which shows USA Band, 1900 Band, 850 band etc...
I'm unable to revert back to the automatic option. I have tried selecting all the four options but non of them works. I'm unable to get network on my phone. Please help me

Still stuck
Engr_Junaid said:
There is no Automatic option available, there are only four options which shows USA Band, 1900 Band, 850 band etc...
I'm unable to revert back to the automatic option. I have tried selecting all the four options but non of them works. I'm unable to get network on my phone. Please help me
Click to expand...
Click to collapse
Is there any custom Rom for HTC M8 sprint which has the option to choose Automatic radio bands? Please anyone share any solution.
Here i found this thread, that guy was able to solve the issue, but he didn't share the solution.
https://forum.xda-developers.com/showthread.php?t=2788803

Engr_Junaid said:
Is there any custom Rom for HTC M8 sprint which has the option to choose Automatic radio bands? Please anyone share any solution.
Here i found this thread, that guy was able to solve the issue, but he didn't share the solution.
https://forum.xda-developers.com/showthread.php?t=2788803
Click to expand...
Click to collapse
Flashing RUU will slove your problem as it have stock radio settings .
I was having same problem in sprint m8 .
The process i follow
Flash sprint RUU.
Go to DIAG MODE
connect phone to dfs .
Enable all 3g bands .
Sent from my XT1526 using Tapatalk

Thank you for your reply, Please if you can share more detailed instructions
sonnu0100 said:
Flashing RUU will slove your problem as it have stock radio settings .
I was having same problem in sprint m8 .
The process i follow
Flash sprint RUU.
Go to DIAG MODE
connect phone to dfs .
Enable all 3g bands .
Sent from my XT1526 using Tapatalk
Click to expand...
Click to collapse
I have flashed the stock RUU, please provide more details about dfs and how to enable all 3g bands? I'm looking forward to you.

Try this!
1) Put your phone in LTE/CDMA network mode
2) Dial ##786#. It will open the EPST menu.
3) Select Edit mode and put 000000as the MSL/password.
4) from the Options menu, select reset settings.
please note that this will also factory reset your phone as well as the radio settings and you should be able to get the signal after restarting and putting the phone in GSM/UMTS mode again (if not already).
To enable all 3G bands, follow this post:
https://forum.xda-developers.com/sprint-htc-one-m8/general/enabling-3g-umts-countries-t2847461