M using a Lumia 720 n since few days i am experiencing a problem with the OS. Out of nowhere i get an option to slide to power off and automatically my phone unlocks and keeps blinking.it is some issue i want to get sorted of! Some advise pls!
Do you have your device on the charger at this time? It will automatically turn back on when connected to the charger. That is not a bug, it is a normal feature.
If it is doing that out of the blue, I recommend doing a soft reset. If that doesn't fix it then set up backup under settings then do a hard reset. If you let it back up, it will save almost everything including your start screen setup. Above poster is right about phone behavior on charging plate but that doesn't sound like your problem.