Re: how can i upgrade may Panasonic p55 to lollipop version....
if one is available from your manufacturer then go check for it @ settings > about > system updates else, you'll need to use a custom ROM.
Flashing the stock ROM fixed it in my case. Got that suggestion from this guide on how to fix please enter the privacy protection password to unlock . You should try that approach
you should've requested for a replacement . You should do that for the second. except your electrical system at home is faulty and blowing these chargers up