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# Prepare Upgrade
## On your computer
1. Download and install adb & fastboot
1. Windows
1. [Download adb & fastboot](https://developer.android.com/studio/releases/platform-tools)
2. It may be necessary to install USB-Drivers by windwos update [see](https://forum.fairphone.com/t/gerat-wird-im-fastboot-mode-nicht-erkannt-os-flashen/42920/2)
1. For Linux do `sudo apt install adb fastboot`
2. Download LineageOS .img and .zip files
1. For the [Fairphone 3](https://download.lineageos.org/FP3)
# Upgrade LineageOS on Fairphone
## 1. Check your prerequisites on your computer
[ ] adb and fastboot are installed on your computer?
[ ] you downloaded LineageOS (zip)?
[ ] you have an usb cable ready?
[ ] your phone has at least 70% battery?
## 2. Enable USB Debugging
1. Navigate to "Settings - About phone"
1. Tap on “Build number” 7 times to enable developer mode
1. Navigate to "Settings - System – Advanced – Developer options"
1. Enable USB Debugging
## 3. Connect via usb
For upgrade your Fairphone, it needs to be connected to your pc.
1. Connect your computer & Fairphone via usb
1. On your Fairphone allow the usb connection
1. Type `adb devices` on your computer (for Windows users: open the terminal in the directory containing adb&fastboot.exe and use the `.\` prefix. The resulting command will be: `.\adb devices`).
The result should show something like
```
List of devices attached
<SerialNumberOfYourPhone> device
```
## 4. Upgrade LineageOS
This step is not very dangerous.
You will loose your desktop layout but your data should stay safe.
The LineageOs boot-loader will verify your binaries.
1. Allow adb to become root: `adb root`
1. Now reboot to recovery image: `adb reboot sideload`.
1. Now upgrade to new LOS version: `adb sideload /path/to/zip`
1. tap on reboot now.
## 5. Post upgrade settings
After upgrad you should check some switches and settings.
1. Setup again your desktop layout.
1. Reactivate Adress- & Caledar-Sync
1. Deny networking without NetGuard to being active