LineageOS Install/Upgrade

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# Unlock the bootloader (only required once for the the first time)#
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# Enable USB debugging mode in Android settings

# Reboot phone into fastmode
./adb reboot bootloader

# Check device is present
./fastboot devices

# Unlock the bootloader:
./fastboot oem unlock-go

# If the device doesn’t automatically reboot, reboot it. It should now be unlocked.
# Since the device resets completely, you will need to re-enable USB debugging to continue.



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# Install TeamWin recovery image (https://twrp.me/ - https://dl.twrp.me/zl1/)#
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# Download twrp-x.x.x-x-zl1.img image

# Enable USB debugging options

# Reboot into fastmode
./adb reboot bootloader

# Check device is detected
./fastboot devices

# Flash new recover image
./fastboot flash recovery twrp-x.x.x-x-zl1.img

# Reboot into recovery to verify the installation
./fastboot boot twrp-x.x.x-x-zl1.img



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#Install LineageOS and Open GApps (same for install or upgrade)
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# Reboot into recovery mode (assuming that TWRP is already installed)
# In TWRP recovery mode goto Advanced > ADB Sideload

# List adb connected devices
./adb devices

# https://wiki.lineageos.org/devices/zl1/upgrade
# Load the lineageos file over USB:
./adb sideload lineage-16.0-20190812-nightly-zl1-signed.zip

# Go to Advanced > ADB sideload and load and install the OpenGApps file
./adb sideload open_gapps-arm64-9.0-pico-20190813.zip

# Reboot

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