correct.
this guides you:
- remove SIM card and check that akku has at least 50%
- eneable USB Debugging and “Allow unlock OEM” in Developer Options
- check if adb is working and device is recognized correctly => adb devices => ACK USB debugging on phone-screen. check box: always trust
- adb reboot bootloader
- check if fastboot is working and device is recognized correctly => fastboot devices
- fastboot flashing unlock => Acknowledge unlocking on phone (VOLUME UP + POWER) Device is doing a factory reset and reboots to system
- start again in bootloader => switch phone off. pull out USB cable. press Volume (-) and put in USB cable in. Keep Volume (-) pressed. Phone should start in bootloader. (¹)
- check if fastboot is working and device is recognized correctly => fastboot devices
- fastboot flash recovery_a iode-2.4-20220405-FP4-recovery.img
- fastboot flash recovery_b iode-2.4-20220405-FP4-recovery.img
- fastboot erase avb_custom_key
- fastboot flash avb_custom_key avb_custom_key-FP4.bin
- press VOLUME UP until see message reboot in recovery. Then POWER
- From recovery => Factory reset => Format Data/factory reset
- From recovery => Apply update => Apply from ADB => adb sideload iode-2.4-20220405-FP4.zip
- back to bootloader mode. From recovery => Advanced => reboot to bootloader
- check if bootloader unlock ability is possible => fastboot flashing get_unlock_ability → (bootloader) get_unlock_ability: 1 ==> if you get 1 then follow with step 17) otherwise do not lock bootloader (can brick your phone) and follow with step 18)
- fastboot flashing lock
- reboot system. First should see a Lineage screen doing a wipe. After a second (automatic) boot you should see the yellow boot screen and then the iode bootscreen.
- start setup wizard
(¹) From FP Support Page:
Alternatively, you can disconnect the USB cable, turn off your Fairphone, then connect the cable and hold the volume down button. After a few seconds, you’ll see the fastboot mode
Recovery:
https://github.com/iodeOS/ota/releases/download/v2-FP4/iode-2.4-20220405-FP4-recovery.img
Image:
https://github.com/iodeOS/ota/releases/download/v2-FP4/iode-2.4-20220405-FP4.zip
avb_custom_key:
https://github.com/iodeOS/ota/releases/download/v2-FP4/avb_custom_key-FP4.bin
verified boot with user-settable avb key:
