OS update not working, and manual flash installation not working either

[AnotherElk]

@Alessandro_Tavoni

Anything else left to try?

If it’s not the cable, then this looks like driver trouble.
This here was done because MTP didn’t work when TWRP was booted, but it could serve as a generic driver repair …

@AnotherElk

To get MTP running again, I did the following …

• Disconnected the phone from the computer.
• In Control Panel - Programs and Features:
  Uninstalled everything with “MTP” or “ADB” in its name.
• Rebooted Windows.
• In Control Panel - Device Manager:
  Enabled View - Show hidden devices, and then uninstalled every possible ADB, MTP and smartphone device, hidden or not.
• Rebooted Windows.
• Connected the phone again with booted TWRP, Windows then needed a moment to set up MTP again automatically and prompted a success message afterwards.

Et voilà … Now the Fairphone 2 with “Internal Storage” and “Micro SD card” shows up again in Explorer as soon as TWRP is booted and the phone is connected via USB. I tried TWRP 3.2.3-0 and 3.3.1-0.

…

Turns out I deleted my working dic:adb and dic:fastboot commands with this endeavour (they were probably from Minimal ADB and Fastboot), so I did the following …

• Downloaded the current Android SDK Platform Tools, it’s better to use these anyway.
• Unzipped the ZIP file to C:\platform-tools (you can unzip it to wherever you like).
• Added this path to the Windows “PATH” environment variable, so adb and fastboot could be run from everywhere again without always having to prefix them with C:\platform-tools\ .