FP2 not rebooting after updating to 21 / Android 9

[AnotherElk]

@kubeti

Windows. Process not working. File .bat activated, could not find the device (it is data cable), blue light flashing (booting mode)

This here was posted for a Fairphone 3+, but the process ist the same for the Fairphone 2 …

FP3+ no USB conection via fastboot, unlocking bootloader not possible

There’s also this …

@AnotherElk

Here’s a generic driver and ADB/Fastboot repair …

• Disconnect the phone from the computer.
• In Control Panel - Programs and Features:
  Uninstall the Android SDK (if installed) and everything with “MTP” or “ADB” in its name.
• Reboot Windows.
• In Control Panel - Device Manager:
  Enable View - Show hidden devices, and then uninstall every possible ADB, MTP and smartphone device, hidden or not.
• Reboot Windows.
• Connect the phone again. (Windows should install the necessary drivers then automatically. They can be named after a different device, this doesn’t matter.)

There was a time when fastboot on Windows was the most robust thing and the last thing to fail. We need a time machine.