You don't need the power button to restart your Android. If yours is broken or you simply want options, here are two.
If your Android phone has become so painfully slow that you're starting to miss your old flip phone, don't rush out to buy a ...
Assuming your phone is on and online, you should be able to see its location on a map. From there, you can make it ring, lock it, set a lock screen note to tell whoever has it how to get it back to ...