What are the security challenges for LineageOS

Android without Google! LineageOS on the OnePlus 3

Install LineageOS, the successor to Cyanogenmod, on the OnePlus3

LineageOS (Image source: LineageOS)

In this guide I will show you how to install the latest LineageOS on the OnePlus 3.
You need the following requirements for this:

One Plus with Original ROM and Locked
It is best to fully charge the battery!
USB-C cable
Working ADB and Fastboot installation Win / Linux
Coustom Recovery Image e.g. TWRP
LineageOS Nightly Build (Unfortunately Stable doesn't exist yet!)

Download links:
https://twrp.me/devices/oneplusthree.html
https://download.lineageos.org/oneplus3

WARNING: We assume no liability for any damage to your devices!
Step 1: (Fastboot Mode)

The first thing we do is turn off the device
press and hold Volume UP + Power at the same time
and we are in fastboot mode
In the shell you enter the following command: fastboot oem unlock
Now “Unlock bootloader?” Appears on the device. Use the volume buttons to go to "YES Unlock bootloader" and confirm with POWER.
Now the device will restart. Press Volume DOWN and select Fastboot mode again.
Enter the following command on the shell:

fastboot flash recovery twrp-3.0.3-0-oneplus3.img

Now we start in TWRP. You choose Recovery Mode above in Fastboot mode

Step 2: (TWRP)

Move the slider to the right and select "Swipe to Allow Modifications"

goes to Advanced

selects ADB sideload

Activates Wipe Dalvik Cache and Wipe Cache, then Swipe to Start Sideload
enter the following command on the shell:

adb sideload lineage-14.1-20170208-nightly-oneplus3-signed.zip

It should look like the screenshot:

Select Reboot on the device, and then "do not install the app".

And now have fun with Lineage OS 😀

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