If you ever need to return your Nexus 4 back to complete factory for unrooting or warranty purposed, you can use these Nexus 4 stock firmware files.
Don’t know how to flash stock firmware files? See How to Unroot Nexus 5 with Stock Firmware. (It’s same for Nexus 4 but with Nexus 4 firmware files.)
Android 5.1 LMY47O Stock Firmware for Nexus 4 – Link
Android 5.0.1 LRX22C Stock Firmware for Nexus 4 – Link
Android 5.0 LRX21T Stock Firmware for Nexus 4 – LinkNeed Help? Follow/add me on Google+, Facebook, or Twitter!
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You will need a rooted Nexus 4 to install all ROM/kernels.
NOTE: THE AUTHOR OF THIS SITE IS NOT RESPONSIBLE IF YOU MESS UP YOUR PHONE, PLEASE READ INSTRUCTIONS TWICE BEFORE TRYING IF THIS IS YOUR FIRST TIME TO ROOTING AND CUSTOM ROMS!
First time to rooting and custom ROMs?
Please see our Nexus 4 FAQ FIRST!!!