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128 lines
3.6 KiB
Markdown
128 lines
3.6 KiB
Markdown
# OTA Update on a Rooted Device
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The installation of OTA updates often fails if the device has been rooted. Though it's still possible – without data loss. This guide shows how, using *TWRP* and *Magisk*.
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***IMPORTANT:** Before you start **backup** everything that's important! Proceed at own risk!*
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-------------------------------------
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## Prerequisite
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1. The Update file of the version that's already running on the device (*NOT* the update you want to install)
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1. [**TWRP**](https://twrp.me/) for your device
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1. [**Magisk**](https://forum.xda-developers.com/apps/magisk/official-magisk-v7-universal-systemless-t3473445)
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1. *ADB* and *Fastboot* inclusive developer mode the device
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Don't forget to check the checksums of all files.
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Doing the update isn't that difficult: Reset some system partitions, install OTA, refresh *TWPR* and *Magisk*, done. There are two versions of this guide: The short version is just a list of steps, while the long version contains each step and the commands necessary.
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## Short Version
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1. Download the Update *current installed*
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1. Enable USB Debugging
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1. Boot to Bootloader
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1. Flash *recovery*, *system* and *boot* images
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1. Reboot
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1. Flash *TWRP*
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1. Boot to Recovery
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1. Install *Magisk*
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1. Reboot
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-------------------------------------
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## Long Version
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At first double check your backups and the prerequisites listed above.
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### Preparation
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##### Copy Magisk to your device
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Copy (or download) Magisk Zip to your device. It doesn't matter if it's on the internal or SD memory, just place it somewhere you can find it again later. You can do this step at any later time too.
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##### Stock files of current running version
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Download the update file for the version running on your device, not the version you want to install. Given you are running on v1.2.3 and want to update to v1.2.4, you need the v1.2.3 file.
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Unpack the downloaded file, you need: `recovery.img`, `system.img` and `boot.img`.
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##### Enable USB Debugging
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Plug the divce to your computer throuth USB and and enable *USB Debugging* on the device.
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### Flash System Images
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Open a terminal and use these commands to flash the necessary partitions (don't type the `$`).
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```sh
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# Check if device is recognized
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> adb devices
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# Boot into bootloader
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> adb reboot bootloader
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# Check device again in Bootloader
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> fastboot devices
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# Flash recovery image
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> fastboot flash recovery recovery.img
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# Flash system image
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> fastboot flash system system.img
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# Flash boot image
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> fastboot flash boot boot.img
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# Reboot device
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> fastboot reboot
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```
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### Install OTA
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Install the *OTA* as usual on the device. The update will reboot automatically. Once this is done check that the installed version is correct and your system is up to date.
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### Install TWRP
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Flash *TWRP* using *ADB*. The image typically has a differnt name, for simplification `TWRP.img` is used here.
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```sh
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# Check if device is recognized
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> adb devices
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# Boot into bootloader
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> adb reboot bootloader
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# Check device again in Bootloader
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> fastboot devices
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# Flash TWRP
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> fastboot flash recovery TWRP.img
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# Reboot device
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> fastboot reboot
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```
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##### Boot into TWRP
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When the last command restarts the device, use the *Volume Keys* to navigate. Select boot into *"Recovery"*. *TWRP* will show up then.
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### Install Magisk
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From the *TWRP* menu select *"Install"* and install the *Magisk* Zip. Reboot afterwards.
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Note: *It's a good chance to clear the *Dalvik-Cache* here, but that's fully optional.*
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### Done
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Once back in your system make sure everything works fine, you are running the latest version and root is enabled. Just one last step: Disable *USB Debugging*.
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That's it!
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