No MAC or IP address on Moto X 2013

A

AC Question

I updated my Moto X to Lollipop 5.1 and since then I have had issues with Wifi. Sometimes it will come on and then switch off, sometimes it won't switch on at all. In Wifi advanced settings, MAC & IP address are 'Unavailable' - this is only when I cannot turn on Wifi. I have tried to clear cache partition and also a factor reset & reboot, the problem still persists. I spoke with Motorola, and they suggest I send the phone back for a 'paid repair'. Lollipop 5.1 is firmly stuck on my phone as I have been told you can only upgrade, you cannot downgrade to a previous software version even after a factor reset.

Can anyone help?