FP3 latest update corrupt, doesnt work

[AnotherElk]

@Julian

If I press and hold the power button and then chose “start”

Don’t choose anything. This is already Fastboot Mode. In this mode …

• Connect your phone to a computer via USB.
• If not done already, download the current Android SDK platform tools to the computer and unzip the ZIP file to a folder you can navigate to easily.
• Open a command line/ terminal and navigate to the folder to which you unzipped the tools. If you are unfamiliar with the command line/ terminal, here’s a really good and short 1 page introduction to everything you need for now … https://tutorial.djangogirls.org/en/intro_to_command_line/
• Execute the commands.
  fastboot devices … will display an ID of your phone if the USB connection and the fastboot command work, it’s a good test before doing anything else.

@AnotherElk

fastboot getvar current-slot … should give you the slot which now doesn’t boot … or “INVALID” if something went even more wrong.

fastboot --set-active=a or fastboot --set-active=b … will set the slot for the next boot. Try whether the phone boots with this. The data partition is shared between the two slots, so the data will be the same and hopefully not affected so far.