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# Prepare Installation
## On your computer
1. Download and install adb & fastboot
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1. In case of Windows
1. [Download adb & fastboot ](https://developer.android.com/studio/releases/platform-tools )
2. Maybe it is necessary to install USB-Driver by windwos update [see ](https://forum.fairphone.com/t/gerat-wird-im-fastboot-mode-nicht-erkannt-os-flashen/42920/2 )
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1. In case of Linux `sudo apt install adb fastboot`
2. Download LineageOS .img and .zip files
1. In case of [Fairphone 2 ](https://download.lineageos.org/FP2 )
1. In case of [Fairphone 3 ](https://download.lineageos.org/FP3 )
3. Generate Unlockcode
1. In case of Fairphone 2, it is not necessary
1. In case of Fairphone 3:
- Find IMEI number (Settings - About phone)
- Find serial number (Settings - About phone - Model and Hardware)
- enter them [here ](https://www.fairphone.com/en/bootloader-unlocking-code-for-fairphone-3/ ) and get your unlock code.
