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[Android] Upgrading LineageOS 20.0 to 21.0 on my Xiaomi Mi 8 (dipper)

Install the Android Debug Bridge (ADB)

https://wiki.lineageos.org/adb_fastboot_guide.html
https://github.com/M0Rf30/android-udev-rules#installation

# check if device is found
adb devices
# reboot into sideload modus
adb reboot sideload

Or manually boot into recovery, holding Volume Up + Power when the phone is off. Navigate to AdvancedADB Sideload.


Update MIUI Firmware

Following the docs, I first had to check the Firmware version. V12.0.3.0.QEAMIXM was required, and I already had it installed.
If you’re on an older version, download the right MIUI Firmware for your device from https://xiaomifirmwareupdater.com/firmware/dipper/.
Flash the new Firmware via TWRP or via ADB sideload.

adb sideload fw_dipper_miui_MI8Global_V12.0.3.0.QEAMIXM_7619340f8c_10.0.zip

Flash latest recovery

Since I follow the LineageOS subreddit, I have already seen posts with problems with the latest update. Check here: https://www.reddit.com/r/LineageOS/comments/1fxlmtq/regular_ota_update_20241005_on_xiaomi_mi8_dipper/
There it is recommended to flash the latest recovery to prevent any issues. Although this is step 1 in the upgrade guide, I skipped updating the recovery the last years, because I was using TWRP instead of the LineageOS recovery. But to be on the safe side, this time I flashed the LineageOS recovery (which meant loosing/removing TWRP). To flash the recovery, you must first boot into fastboot by using adb or Volume Down + Power when the phone is off, like it is described here.

# boot into fastboot
adb -d reboot bootloader
# flash recovery
fastboot flash recovery lineage-21.0-20241208-microG-dipper-recovery.img

Download and flash new LineageOS image

I’m using the LineageOS fork LineageOS for microG. Download it from here: https://download.lineage.microg.org/dipper/ (MI 8 = dipper)
The upgrade steps are the same as for the official rom: https://wiki.lineageos.org/devices/dipper/upgrade. As I’ve already flashed the latest recovery, I only had to flash the new LineageOS image.

# reboot again into recovery
adb reboot sideload
# flash again new image
adb sideload lineage-21.0-20241208-microG-dipper.zip

[Android] Upgrading LineageOS 19.1 to 20.0 on my Xiaomi Mi 8 (dipper)

Install the Android Debug Bridge (ADB)

https://wiki.lineageos.org/adb_fastboot_guide.html
https://github.com/M0Rf30/android-udev-rules#installation

# check if device is found
adb devices
# reboot into sideload modus
adb reboot sideload

Or manually boot into TWRP recovery, holding Volume Up + Power when the phone is off. Navigate to AdvancedADB Sideload.


Update MIUI Firmware

Following the docs, I first had to check the Firmware version. V12.0.3.0.QEAMIXM was required, and I already had it installed.
If you’re on an older version, download the right MIUI Firmware for your device from https://xiaomifirmwareupdater.com/firmware/dipper/.
Flash the new Firmware via TWRP or via ADB sideload.

adb sideload fw_dipper_miui_MI8Global_V12.0.3.0.QEAMIXM_7619340f8c_10.0.zip

Download and flash new LineageOS image

I’m using the LineageOS fork LineageOS for microG. Download it from here: https://download.lineage.microg.org/dipper/ (MI 8 = dipper)
The upgrade steps are the same as for the official rom: https://wiki.lineageos.org/devices/dipper/upgrade. In my case only flashing the new image.

adb sideload lineage-20.0-20231204-microG-dipper.zip

[Android] Upgrading LineageOS 18.1 to 19.1 on my Xiaomi Mi 8 (dipper)

Install the Android Debug Bridge (ADB)

https://wiki.lineageos.org/adb_fastboot_guide.html
https://github.com/M0Rf30/android-udev-rules#installation

# check if device is found
adb devices
# reboot into sideload modus
adb reboot sideload

Or manually boot into TWRP recovery, holding Volume Up + Power when the phone is off. Navigate to Advanced -> ADB Sideload.


Update MIUI Firmware

Following the docs, I first had to check the Firmware version. V12.0.3.0.QEAMIXM was required, and I already had it installed.
If you’re on an older version, download the right MIUI Firmware for your device from https://xiaomifirmwareupdater.com/firmware/dipper/.
Flash the new Firmware via TWRP or via ADB sideload.

adb sideload fw_dipper_miui_MI8Global_V12.0.3.0.QEAMIXM_7619340f8c_10.0.zip

Download and flash new LineageOS image

I’m using the LineageOS fork LineageOS for microG. Download it from here: https://download.lineage.microg.org/dipper/ (MI 8 = dipper)
The upgrade steps are the same as for the official rom: https://wiki.lineageos.org/devices/dipper/upgrade. In my case only flashing the new image.

adb sideload lineage-19.1-20221217-microG-dipper.zip   

[Android] Upgrading LineageOS 17.1 to 18.1 on my Xiaomi Mi 8 (dipper)

Install the Android Debug Bridge (ADB)

https://wiki.lineageos.org/adb_fastboot_guide.html
https://github.com/M0Rf30/android-udev-rules#installation

# check if device is found
adb devices
# reboot into sideload modus
adb reboot sideload

Or manually boot into TWRP recovery, holding Volume Up + Power when the phone is off. Navigate to Advanced-> ADB Sideload.


Update MIUI Firmware

Following the docs, I first had to check the Firmware version. I was running V12.0.2.0.QEAMIXM, but V12.0.3.0.QEAMIXM is required.
Download the right MIUI Firmware for your device from https://xiaomifirmwareupdater.com/firmware/dipper/.
Flash the new Firmware via TWRP or via ADB sideload.

adb sideload Downloads/fw_dipper_miui_MI8Global_V12.0.3.0.QEAMIXM_7619340f8c_10.0.zip 

Download and flash new LineageOS image

I’m using the LineageOS fork LineageOS for microG. Download it from here: https://download.lineage.microg.org/dipper/ (MI 8 = dipper)
The upgrade steps are the same as for the official rom: https://wiki.lineageos.org/devices/dipper/upgrade. In my case only flashing the new image.

adb sideload Downloads/lineage-18.1-20220602-microG-dipper.zip 

[Android] Upgrading LineageOS 16.0 to 17.1 on my Xiaomi Mi 8 (dipper)

Install the Android Debug Bridge (ADB)

https://wiki.lineageos.org/adb_fastboot_guide.html
https://github.com/M0Rf30/android-udev-rules#installation

# check if device is found
adb devices
# reboot into sideload modus
adb reboot sideload

Or manually boot into TWRP recovery, holding Volume Up + Power when the phone is off. Navigate to Advanced-> ADB Sideload.


Update MIUI Firmware

If your current MIUI Firmware does not support Android 10, you have to update it first.
Download the newest MIUI Firmware for your device from https://xiaomifirmwareupdater.com/firmware/dipper/.
Flash the new Firmware via TWRP or via ADB sideload.

adb sideload Downloads/fw_dipper_miui_MI8Global_V12.0.2.0.QEAMIXM_4e38c51916_10.0.zip   

Download and flash new LineageOS image

I’m using the LineageOS fork LineageOS for microG. Download it from here: https://download.lineage.microg.org/dipper/ (MI 8 = dipper)
The upgrade steps are the same as for the official rom: https://wiki.lineageos.org/devices/dipper/upgrade. In my case only flashing the new image.

adb sideload Downloads/lineage-17.1-20210327-microG-dipper.zip