I have an unrooted Nexus 4 and running Android 5.0. When the 5.0.1 OTA update came out I could download it and start installing it and then get screen that said error with the android robot on it's back but with no helpful information. I just tried again with 5.1 and I got the same problem. I factory reset my phone and it still doesn't work!
Please can someone advise on what to do?
Thanks in advance.