This tutorial for Z3 version D6603, D6653, D6633, D6646 and D6643
The order is this:
- Update to .291 as usual via OTA from Sony or flashing directly.
- Make sure you have ADB set up correctly.
- Use FlashTool to flash the attached .575_kernel.zip for your device before running the recovery tool. You need to re-name the zip and change the .zip extension to .ftf before flashing it!
- Download Recovery_for_MM575-291v5.zip and extract it.
- Enable USB-debugging on your phone and plug phone to computer via USB
- Run install.bat (as Admin just to be sure)
- After running the tool you should boot straight into recovery. Then flash Super-SU-Update for ROOT your phone, put it on the device in or on a USB stick if device is encrypted.
- Re-flash the .291 KERNEL back again, without losing root or recovery, with Flashtool using the attached .291_kernel.zip for your device. Again, change/re-name the .zip extension to .ftf first!
*Additional Notes*
If on Windows, in FolderSettings - Show file extensions to be able to rename from ZIP to FTF.
- Assuming it has booted to TWRP after running the tool, to re-enter it, press volume down during re-boot when you see the green LED and feel a vibration. You have 2 seconds to do it. No need to smash volume down repeatedly.
- Reboot apps DO NOT WORK on Sony MM.
- Install a new busybox through Play store at your own risk. Some will break recovery, some won't.
- Some apps install their own busybox. This can also break recovery. If this happens, try running the tool again.
File you need :
Super-SU-update - download
Recovery_for_MM575-291v5 - download
D6603-6653_23.5.A.0.575_kernel - download
D6603-6653_23.5.A.0.291_kernel - download
D6633_23.5.A.1.291-kernel - download
D6633_23.5.A.0.575-kernel - download
source : xda-forum