mobile

I bought an AT&T M8 on eBay a few months ago. My carrier is T-Mobile. Everything actually worked fairly well but there are a few nagging issues. No OTA updates, MMS doesn't work, etc.

I did some research on the forums here and elsewhere and the solution seemed to be flashing the phone to a stock T-Mobile firmware. Tonight I set out to do that.

1. I downloaded and paid for Sunshine. Installed with no issues.


2. I installed HTC Synch and ADB on my PC


3. I flashed CWM recovery onto the phone using fastboot. TWRP wouldn't work for some reason.


4. I used CWM to install SuperSU to root the phone.


5. I used fastboot to change the CID to T-MOB010.


6. I used scotty1223's instructions here to change the MID from 0P6B12000 to 0P6B13000.

There were some false steps along the way but I think everything worked fine to this point.

Next I used fastboot to flash the firmware I found here. At this point I don't even remember why I decided that was the right choice.

The firmware flash failed the first time but apparently that isn't uncommon. I ran it a second time and it seemed to succeed. I rebooted the phone using fastboot. When it comes up I see the HTC logo on a white background and I can still hear the AT&T "chimes" but I don't see the AT&T globe. And that's it. The phone won't finish booting. I can reboot into the fastboot menu but Recovery just gives me an red triangle with an exclamation point. ADB can't communicate with the phone anymore. So I feel like I'm stuck.

Any advice on what to do next?