Google has released Android 5.1.1 on the Nexus 7 and Nexus 10, as of now we don’t know if the update will officially become available on any other of the Nexus lineup of devices. Cyanogen has just released the new CM12.1 Nightly based on Android 5.1.1 which allows Nexus 4 users to install Android 5.1.1 by flashing the CM2.1 ROM.

The guide Bellow will allow you to install Android 5.1.1 Nexus 4 but keep in mind that it does require you to perform a factory reset which will remove all your data from your device.

Android 5.1.1 Nexus 4 – How to install Android 5.1.1 on Nexus 4

1. Make sure you download CM 12.1 20150507 for your device here: cm-12.1-20150508-NIGHTLY-mako.zip
2. Head over here to download Gapps for Android 5.1.1
3. Connect your Nexus 4 to your computer
4. Move the .zip files downloaded previously to your smartphone’s internal memory
5. Once done, unplug your device
6. Turn your smartphone off and then back on into recovery mode
7.  from recovery select “wipe data factory reset”. Then pick “wipe cache partition”. Finally choose “advanced” followed by “wipe dalivik cache”.
8. Then choose the “install zip from SD card” option and install the Cyanogenmod .zip file
9. Once done, you can install the Gapps to get your Google Apps
10. You have now successfully updated to Android 5.1.1 Lollipop (CM12.1) Nexus 4