Sony Xperia M C1905 has now got the famous CM13 Nightly build custom ROM by CyanogenMod. This ROM is unofficial but it has the features of official Android Marshmallow update. This ROM can only be flashed on your device only if it is rooted and has custom recovery installed on it.Sony Xperia M

Also it must be noted that once you root your device your device warranty will void and your device will no longer have warranty coverage. So, if you agree with this, then you can go ahead towards the procedure and flash the ROM to experience the new Android Marshmallow on your Sony Xperia M C1905.

Let us now go further ahead and have a look at the procedure and also few important points you need to note before we begin with the flashing process.

Preparing your Phone

  • This instructions are strictly for Sony Xperia M C1905 phone, so do not try it on any other device or you may brick your device.
  • Device should be fully charged up to 100%.
  • Install Sony Xperia M USB drivers on your computer.
  • Back up all the required data to some safe storage.
  • Make a Nandroid back up of the current ROM so that you can restore it when required.
  • Make sure the device bootloader is unlocked.
  • Root your device and install custom recovery on it if not done already.
  • Enable USB debugging mode of your device. Go to Settings > Developer options > USB debugging mode.USB Debugging

Install Android 6.0.1 Marshmallow CM13 Nightly Custom ROM

  1. Download the Android 6.0.1 marshmallow custom ROM from here.
  2. Download the Google App’s for Android 6.0.1 Marshmallow from here.
  3. Connect the device to computer and transfer the ROM file and Google App’s file to your device storage.
  4. Disconnect the device and turn it off completely.
  5. Reboot the device into recovery mode, press and hold Volume Down + Power key for few seconds.
  6. When in recovery mode tap on Wipe tab and select all the options given under it.
  7. Now, confirm the wipe action by swiping the button at the bottom of the screen.
  8. Now, return to main menu and tap on Install tab.
  9. Locate the ROM file stored on you device and select it.
  10. Swipe the button at the bottom to flash the ROM file on your device.
  11. In the same way flash the Google App’s on your device (step 9-10).
  12. Return to main menu and tap on Reboot.
  13. System will now reboot in normal mode.

That’s all you can now check the device Android version in Settings > About device > Android version.