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# Install LineageOS on Fairphone
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## 1. Check your prerequisites on your computer
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[ ] adb and fastboot are installed?
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[ ] you have downloaded bootimage (img) and LineageOS (zip)?
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[ ] you have the unlock code (in case of Fairphone 3)?
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[ ] you have a usb cable prepared?
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[ ] you are prepared to erase all the data on your fairphone?
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## 2. Unlock your fairphone
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Unlocking will allow us to overwrite the boot-loader.
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1. Navigate to "Settings - About phone"
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1. Press 7 times “Build number” to enable Developer mode
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1. Navigate to "Settings - System – Advanced – Developer options"
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1. Enable USB Debugging
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1. In case of Fairphone3:
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1. Navigate to "Settings - System – Advanced – Developer options"
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1. Enable OEM unlocking with unlock your code
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## 3. Connect via usb
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For overwriting your fairphones boot-loader we will need connection to your pc.
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1. Connect your computer & fairphone via usb
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1. On your fairphone allow the usb connection
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1. Type `adb devices` on your computer (in case of windows open the terminal in the directory containing adb&fastboot.exe and use the `.\` prefix. The resulting command will be: `.\adb devices`).
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The result should show something like
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```
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List of devices attached
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<SerialNumberOfYourPhone> device
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```
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## 4. Prepare recovery image installation
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The next step is the critical one. If this step goes wrong your fairphone may remain broken. Time to do some checks:
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1. Check that your phone has at least 50% battery.
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1. Reboot your fairphone to bootloader mode: Type `adb reboot bootloader` on your computer.
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1. Fairphone should show the bootloader screen.
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1. Type `fastboot devices` on your computer. The result should show something like
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```
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<SerialNumberOfYourPhone> fastboot
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```
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1. Check whether your downloaded recovery image is not broken. In case of
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1. windows type `Get-FileHash <image_filename.img>` on your computer.
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1. linux type `sha256sum <image_filename.img>` or alternatively `shasum -a 256 <image_filename.img>` on your computer.
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1. The result should look like
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```
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b6494278d0a399547a9344a6018a30b388f71a97ef52989bcdd661002f3a8631 lineage-18.1-20210906-recovery-FP3.img
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```
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1. Now compare the number to the one given on the recovery image download page. Ensure, you are browsing secure with "https".
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[<img src="img/sha256.png" width="500" height="250">](img/sha256.png)
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1. Be aware, in the next step all data will be erased on your fairphone!
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## 5. Install LinegaeOS recovery image
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All checks passed? Then lets continues:
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1. Type on your computer `fastboot oem unlock`.
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1. If your fairphone reboots, you might have to do the steps 2.1-2.4 again to re-enable USB debugging. Then `adb reboot bootloader` will bring you back.
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1. Install fastboot image & reboot to recovery
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1. in case of Fairphone2
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1. by typing on your computer `fastboot flash recovery <image_filename.img>` (<image_filename.img> is the img-file you have downloaded in 1.).
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1. With the device powered off, hold Volume Up + Power. Release when boot logo appears.
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1. in case of Fairphone3
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1. by typing on your computer `fastboot flash boot <image_filename.img>` (<image_filename.img> is the img-file you have downloaded in 1.).
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1. On the phone you should not see any difference and you phone should remain in the bootloader screen. Then hold Volume Up + Power. Release when boot logo appears.
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Please take care not to boot in to your old Android / FairphoneOS. If you missed the proper reboot into recovery by buttons you've to step back to step 1. because your old os reinstall its own recovery over the one you installed.
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## 6. Install LineageOS
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This step is no more dangerous. You can retry as often you want to. The LineageOs boot-loader will verify your binaries.
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If you are already in the recovery mode you can go to step 6.3.
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1. Reboot your fairphone again to bootloader mode: Type `adb reboot recovery` on your computer.
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2. Your fairphone now boots to the new LineageOS recovery image. Then start the recovery mode.
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[<img src="img/start.jpg" width="300" height="400">](img/start.jpg)[<img src="img/recovery.jpg" width="300" height="400">](img/recovery.jpg)
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3. Choose Factory Reset - Format Data/Factory Reset
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[<img src="img/reset.jpg" width="300" height="400">](img/reset.jpg)[<img src="img/format.jpg" width="300" height="400">](img/format.jpg)
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4. Return to main menu
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5. Apply update - Apply from ADB
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[<img src="img/apply.jpg" width="300" height="400">](img/apply.jpg)[<img src="img/sideload.jpg" width="300" height="400">](img/sideload.jpg)
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6. Type `adb sideload <lineagos.zip>` on your computer (<lineagos.zip> is the zip-file you have downloaded in 1.).
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[<img src="img/done.jpg" width="300" height="400">](img/done.jpg)
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7. Check whether you see the `Step 2/2` on the bottom of your fairphone.
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### 6.1 Optional installation of Google Apps
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If you can't abstain from the Google Apps or the Google Play Store there exist packages with various scopes, you will find a package comparison here: [https://github.com/opengapps/opengapps/wiki/Package-Comparison](https://github.com/opengapps/opengapps/wiki/Package-Comparison). You have to install Google Aps in front of first the first start wizzard.
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1. Download the favored version from [here](https://opengapps.org/).
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1. Install the gapps the same way, you installed LineageOs: `adb sideload <gapps.zip>`
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### 6.2 Reboot into LineageOS and prepare for OEM Lock
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Reboot the system then your phone should start the installed LineageOS.
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Then do again steps 2.1 - 2.4 to re-enable USB-debugging and boot again into fastboot mode with `adb reboot bootloader`.
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## 7. OEM Lock
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OEM unlocking / locking will erase all data, so we should ensure to do the lock again now.
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1. Type `fastboot devices` on your computer. The result should show something like
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```
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<SerialNumberOfYourPhone> fastboot
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```
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1. Type on your computer `fastboot oem lock`.
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## 8. Start LineageOS
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First start of your new LineageOS - hurray.
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1. Walk through the initial LineageOS setup.
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## 9. Download the F-Droid App-Store
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For installing more software we recommend F-Droid
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1. Use the browser on your Fairphone to download F-Droid: [https://www.f-droid.org/](https://www.f-droid.org/)
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1. Visit the download-folder and install F-Droid (accept the warning).
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1. Now you can install Apps like DeltaChat, NextCloud, Fennec, Tusky, k9 (...) through the F-Droid Store.
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1. Open Fennec and install privacy badger as add-on.
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