To boot up into the Android boot menu, start by powering down phone.
Once it is powered off, press the Volume Down and Power button and hold until it turns on.
You should get the boot menu.
How to boot up into Android boot menu
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Category Archives: Android
Install GrapheneOS on Pixel 3
Installing GrapheneOS is pretty well documented on the website.
https://grapheneos.org/install
The following are mainly some of my notes. More detailed instructions are available at the above link.
OEM Unlock
Enable developer options
To enable the developer options on Android go to Settings -> About phone -> Tap on Build number until it says your a Developer.
Allow OEM unlocking
Settings -> System -> Advanced (Dropdown) -> Developer options
Allow OEM unlocking
Unlock Bootloader
Boot into the bootloader By
- Powering down the phone
- Start up while holding the volume down and power button
Run the following command from a computer with fastboot
sudo fastboot flashing unlock
The screen should change, hit the arrow keys to select Unlock the bootloader and confirm with the power button
Download and Verify Images
Download the proper factory image and files from https://grapheneos.org/releases
The name should say something device-factory-date.zip and device-factory-date.zip.sig
The .sig file is used to verify the image in the below section.
Verify the Keys
The commands to do this are from a Linux computer. There may be alternatives for Windows. You can technically skip this section.
Install signify
sudo apt install signify-openbsd -y
Download the public key from https://releases.grapheneos.org/factory.pub
Run and check that the key and the image match.
The following command assumes you are in the same directory as the image and factory.pub file.
sudo signify-openbsd -Cqp factory.pub -x blueline-factory-2020.03.04.16.zip.sig && echo verified
Install Factory (GrapheneOS) Image
Unzip the factory image and change directories into it
unzip blueline-factory-2020.03.04.16.zip && cd blueline-qq2a.200305.002/
Run the flash script to flash the image to your Pixel.
sudo ./flash-all.sh
Wait for it to flash, may take a long time.
NOTE: I ran into issues with the script as my version of fastboot was old. SEE PROBLEMS HEADING BELOW
Relock bootloader
Boot back up into the recovery menu and lock the boot loader with
fastboot flashing lock
Problems
- I ran into issues running the flash-all.sh script. My version of fastboot was old. Ended up downloading a newer version and calling all the commands in the script manually.
- Phone seemed to randomly time out or just hang when trying to run something over fastboot. Unplugging and plugging the phone back in and rerunning the command seemed to resolve the problem.
OEM Unlock using fastboot
On the phone enable Developer options. More info here.
Find the “OEM unlocking” button and enable.
Reboot phone to bootloader.
Plug phone into computer and computer run
sudo fastboot flashing unlock
Use the buttons on the phone to select and enable unlocking.
Enable Developer options on Android
To enable the developer options on Android go to Settings -> About phone -> Tap on Build number until it says your a Developer.
Now you can go to Settings -> System -> Advanced -> Developer options to edit developer settings.
Installing LineageOS on Raspberry Pi B+
Download LineageOS
Download the unofficial LineageOS 16 build from the following page
https://konstakang.com/devices/rpi3/LineageOS16.0/
Unzip
Unzip the file with
unzip ~/Downloads/lineage-16.0-20200207-UNOFFICIAL-KonstaKANG-rpi3.zip
Write to SD Card
Either use the instructions on the following link to write it to the SD card
https://www.raspberrypi.org/documentation/installation/installing-images/windows.md
Or use DD
WARNING! Make sure “/dev/mmcblk0” is the correct SD Card. Refer to here if you need to locate the path for the SD Card.
sudo dd if=~/Downloads/lineage-16.0-20200207-UNOFFICIAL-KonstaKANG-rpi3.img of=/dev/mmcblk0 bs=1M status=progress
Plug you SD Card into your Pi and boot it up.
Installing LineageOS 17 Android 10 on Pixel
Download twrp from here
Download LineageOS 17 from here
Boot phone to boot menu then fastboot twrp
sudo fastboot boot Downloads/twrp-3.3.0-0-sailfish.img
Wipe to factory defaults
Side load LineageOS Android 10 from the Advanced page on TWRP
adb sideload Downloads/lineage-17.0-withMTG-20191217-UNOFFICIAL-sailfish.zip
Reboot and setup.
Extract Android Backup – one liner
Command from here
https://android.stackexchange.com/a/78183/239063
From a command line run
( printf "\x1f\x8b\x08\x00\x00\x00\x00\x00" ; tail -c +25 ~/Path/to/android_backup.ab ) | tar xfvz -
Extract Android backup
https://stackoverflow.com/questions/18533567/how-to-extract-or-unpack-an-ab-file-android-backup-file
Install Android Backup Toolkit
wget https://downloads.sourceforge.net/project/adbextractor/android-backup-tookit-20180521.zip unzip android-backup-tookit-20180521.zip cd android-backup-tookit/android-backup-extractor/android-backup-extractor-20180521-bin
Unpack backup. Changes it from an ab to a tar file
java -jar abe.jar unpack ~/path/to/backup.ab ~/path/to/backup.tar
After thats complete, you can untar it. Change Desktop to the path you want to extract to.
tar -xvf ~/path/to/backup.tar -C ~/Desktop/
LineageOS Updater crashing when trying to install update
The LineageOS Updater downloads updates fine, but crashes as soon as you hit Install.
Looks like there may be a bug that has something to do with an update that it already downloaded and installed, but waiting on the device to reboot.
Reboot the device to resolve the issue.
Other things to try would include deleting and redownloading the update and/or trying a different update.
How to backup your Android phone from Linux
Install adb
sudo apt-get -y install adb
Backup with adb
adb backup -apk -obb -shared -all -f ~/Desktop/AndroidBackup.ab
Unlock your phone, authorize usb debugging, and hit “Back up my data”
You may need to enable USB debugging in the developer options in the settings.