How do I fix dead mobile phone?

hold down the "find handset" button til it flashes, and then let go and press it again while it flashes. This will de-register the phone and you should get a new message saying the the handset isn't registered blah blah blah. Then put it back on the base until it beeps. This should fix your problem, unless the base itself is just dead.

Is the battery low?
Does it happen in safe mode?

Motorola Support Find Answers Motorola Mobility Inc
Mark
Motorola Support

Your battery may be dead. Try to turn it on with a new battery. If that doesn't work, get the internal components checked by a skilled mechanist. Malfunctioning components aren't uncommon. :)

Check that you are not using an app that is continuously accessing the internet and communicating with a server for some reason that is using the phones WiFi or mobile channel. This will drain battery life if incorrectly configured etc ( i.e selecting access to your location, services and other info )

Your phone is set to work only with
certain SIM cards. Check if you are
using the correct operator SIM card.

lg does that, it's a bug, whether or not the battery is empty

what you need to do is unplug the charger if connected, remove the battery (a minute or so) then place it back. it should work then

you can charge it again if the battery is low

Probably manufacter defect taske it to sprint REPAIR store

what phone are you using?
you need to get a phone antivirus installed first and then consider upgrading your external memory if your phone has that option.

I have the same problem. I think it happens when the battery goes completely dead. I didn't get my address book contacts back though. All my text msgs and numbers not on my sim got deleted. I wonder if its the battery or the phone.. hmmm....

sir your sim card is not registerd by your sim card opretor and show your sony phone to mobile repair shopee