I tried to upgrade my Nexus 4 to Android 5.1 but it is now stuck at the "Installing system update..." stage. After the progress bar reaches 5% or so, the screen goes blank and the installation starts again and this happens indefinitely.
I tried to boot in recovery mode but the same thing happens.
Please help, I can't use my phone and have no replacement phone.
I posted the issue on Google's product forum.