tcptomato / android_root_update

Update android 5.x while preserving root.

android_root_update

Update android 5.x while preserving root.

##Prerequisites

ADB, fastboot and the (RIGHT) system image to be installed. An unlocked bootloader. Custom recovery. ( Can also be installed after step 7)

Do it on your own risk!

$ fastboot oem unlock

Unlocking will DELETE all your private data on the phone.

###Install Prerequisites

$ sudo apt-get install android-tools-adb android-tools-fastboot android-tools-adbd android-tools-fsutils  

###Get image For Nexus devices get the factory images here. For others manufacturers check their website.

Process

Check hashsum of the image to verify its integrity

$ sha1sum IMAGE_NAME.tgz

Extract the image from the .tgz

$ tar -xvf IMAGE_NAME.tgz

Move into the extracted folder

$ cd IMAGE_NAME

Prepare your phone

Push the supersu.zip to your sdcard ( you can use adb shell to find the right path on your phone). Or sideload it later using a custom recovery. Reboot into bootloader.

adb push supersu.zip /storage/sdcard0 
adb reboot-bootloader

Flash new bootloader and radio

fastboot flash bootloader bootloader-IMAGE_SPECIFIC_NAME.img
fastboot reboot-bootloader
sleep 5
fastboot flash radio radio-IMAGE_SPECIFIC_NAME.img
fastboot reboot-bootloader
sleep 5

Extract the zip

7z x image-IMAGE_SPECIFIC.zip
cd image-IMAGE_SPECIFIC

Flash the stuff we're interested in

fastboot flash boot boot.img
fastboot flash system system.img

Boot into recovery and reinstall root. Reboot into new android.