1. AC Question's Avatar
    I have an HTC One M8 with AT&T that's running KitKat. It currently does not have cellular service, but I'd like to use it with my new car stereo to have Android Auto and some other apps, but it requires Lollipop or newer. AT&T says I can't do an OTA upgrade without cellular service (it connects to my wi-fi at home and in the car obviously). I've tried to manually load the ROM by downloading it from the HTC website without success.

    Does anyone have advice on getting this device to upgrade? I'm willing to root it (will have to anyway for Appradio Unchained), flash it, do a rain dance, whatever it would take. I'd love to somehow figure out how to flash this thing to a clean version of the Android OS without all the AT&T nonsense!

    Any help is greatly appreciated. I'm pretty tech savvy (well at least back in my day), but I haven't been able to find a specific answer to this situation online yet.
    06-08-2016 12:56 PM
  2. B. Diddy's Avatar
    Welcome to Android Central! Can you use HTC Sync Manager to update the firmware? Download HTC Sync Manager
    06-08-2016 04:05 PM
  3. thebaine's Avatar
    I do have HTC sync, and actually spoke with HTC online support to try and get the update to work, and while they were helpful, I was unable to load it either thru Sync or thru the disabled fastboot/manual method.
    06-08-2016 06:33 PM
  4. Golfdriver97's Avatar
    06-10-2016 09:32 AM

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