diff --git a/Guides/LineageOsInstallation.md b/Guides/LineageOsInstallation.md
new file mode 100644
index 0000000..40fc0df
--- /dev/null
+++ b/Guides/LineageOsInstallation.md
@@ -0,0 +1,74 @@
+
+# Install LineageOS on Fairphone
+
+## 1. check your prerequisites on your computer
+[ ] adb and fastboot are installed? \
+[ ] you have downloaded bootimage (img) and LineageOS (zip)? \
+[ ] you have the unlock code (in case of Fairphone 3)?
+
+- enable Developer mode (press 7 times “Build number” (Settings - About phone))
+- enable OEM unlocking with unlock code (Settings - System – Advanced – Developer options)
+- enable USB Debugging (Settings - System – Advanced – Developer options)
+
+1.2. Download and install dependencies (on Your Computer)
+- install fastboot and adb (sudo apt install adb fastboot)
+- Download LineageOS .img and .zip files [here][LineageOS]
+- connect Fairphone via USB with computer
+- Reboot bootloader (adb reboot 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.
+- Download the favored version from [here][GApps].
+
+1.3. Prepare Phone (on Your Fairphone)
+- start phone in Recovery Mode
+- choose Factory Reset - Format Data/Factory Reset
+- apply update - Apply from ADB
+
+1.4. Install LineageOS (on Your Computer)
+- adb sideload <lineagos.zip>
+- optional: adb sideload <gapps.zip>
+
+1.5. Apply LineageOS (on Your Fairphone)
+- apply update
+
+1.6. Lock the Bootloader again (on Your Computer)
+- adb reboot bootloader
+- fastboot flashing lock
+
+Install Apps
+------------
+2.1. [Here][apkpure] you can download Apps which you can install via the computer on your phone (adb install example.apk).
+
+2.2. Download F-Droid Store [here][Fdroid].
+
+2.3. Now you can install Apps like DeltaChat, NextCloud, Fennec, Tusky (...) through the F-Droid Store.
+
+2.4. Dont forget to check again the predefined settings (additional install a privacy badger).
+
+
+Remove Google-dependencies
+--------------------------
+3.1. enter new DNS: dns2.digitalcourage.de (Settings - Network and Internet - Advanced - Private DNS).
+
+3.2. Check Privacy Settings and GPS (especially browser-settings from Fennec).
+
+3.3. Switch off Print Service (Settings - Connected devices - Connection preferences - Printing).
+
+3.4. Replace Google captive portal check with [Kuketz][kuketz]. Therefore, connect your Fairphone with your computer and execute following adb commands:
+- adb shell 'settings put global captive_portal_http_url "http://captiveportal.kuketz.de"'
+- adb shell 'settings put global captive_portal_https_url "https://captiveportal.kuketz.de"'
+- adb shell 'settings put global captive_portal_fallback_url "http://captiveportal.kuketz.de"'
+- adb shell 'settings put global captive_portal_other_fallback_urls "http://captiveportal.kuketz.de"'
+
+In order to test the settings, if they were correctly adopted, you can type in:
+- adb shell 'settings get global captive_portal_https_url'
+
+
+
+[bootloader]: https://www.fairphone.com/en/bootloader-unlocking-code-for-fairphone-3/
+[LineageOS]: https://download.lineageos.org/FP3
+[apkpure]: https://apkpure.com
+[Fdroid]: https://www.f-droid.org/
+[kuketz]: https://www.kuketz-blog.de/android-captive-portal-check-204-http-antwort-von-captiveportal-kuketz-de/
+[GApps]: https://opengapps.org/
diff --git a/Guides/PrepareInstallation.md b/Guides/PrepareInstallation.md
index fa46dae..750a72f 100644
--- a/Guides/PrepareInstallation.md
+++ b/Guides/PrepareInstallation.md
@@ -3,6 +3,13 @@
 
 1. Download and install adb & fastboot
    1. In case of [Windows](https://developer.android.com/studio/releases/platform-tools)
-   1. in case of Linux `sudo apt install adb fastboot`
-- Download LineageOS .img and .zip files [here](https://download.lineageos.org/FP3)
-- connect Fairphone via USB with computer
+   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.
diff --git a/README.md b/README.md
index 8daa623..7191232 100644
--- a/README.md
+++ b/README.md
@@ -15,7 +15,7 @@ As it is widely known that Google tries to collect data from all possible source
 
 We've enhanced the LineageOS installation guide in order to provide a complete walkthrough for the fairphone including bootloader-unlocking, degoogling & App-Installation.
 
-1. Prepare installation
+1. [Prepare installation](Guides/PrepareInstallation.md)
 2. LineageOs installation
 3. degoogle your phone