1. Reboot your fairphone to recovery mode: Type `adb reboot bootloader` on your computer.
1. Reboot your fairphone to bootloader mode: Type `adb reboot bootloader` on your computer.
1. Fairphone should show the bootloader screen.
1. Type `fastboot devices` on your computer. The result should show sth like
```
A209VYM20201 fastboot
```
1. Type on your computer `fastboot oem unlock`.
1. Install fastboot image by typing `fastboot flash boot .<image_filename>.img` on your computer (<image_filename>.img is the img-file you have downloaded in 1.).
1. Type on your computer `fastboot oem lock`.
bootloader ()
1.2.1. Optional installation of GooglePlay Store
- If you can't abstain from the Play Store there exist a minimum Google installation, (pico) Open GApps.