The phone is a Samsung Galaxy S4.* In the notifications, it shows Checking Device Status (with a symbol of a checkmark in a circle), and then it restarts the phone on its own.* It keeps doing this over and over, about every 15 seconds.* It won't stop restarting itself.*
I tried taking out the battery and putting it back in.* Also tried clearing cached data (not sure if it all cleared though, because it keeps restarting shortly after I select clear cached data).
Please help, thanks for taking time to read this!