My iPhone 4s won't shut off

Is the device plugged into power? Unplug it and try again.

Had this problem today too while on an airplane. Phone shuts down but then instantly reboots.

gmin,

Do you not get the red slider to turn it off? If not, it sounds like your firmware has a glitch. Try a Restore.

I have the same problem...restore worked for a day, then it went back to the same thing..

I just went through the same ordeal! I have a 4s. Its only 13 months old! I didn't drop it, didn't get it wet etc. I went to the verizon retailer to see if they could help... They called verizon tech support. Everybody thinks their a genius cause they try the holding the two buttons down waiting for it to reboot! I tell them I already did it a thousand times! Bottom line it took two days on the charger for it to get past the apple icon screen. DO NOT reimage your phone back to factory! It's the battery! $20 for the battery and if you don't have the tools they cost $9! The worst part is waiting for the delivery! It's not under warranty anymore so I am fixing it myself! Idrop is about $199 o fix it! I love how you can get snowed if you don't do your homework!

I have the same issue but it seems to be associated with a sudden battery drainage. Suddenly my battery won't last the day with hardly any usage. I tried turning the phone off and charge it overnight with it being off, however I discovered that I can't keep it off. The phone reboots moments after being turned off, does anyone think this is just a battery issue? The phone is about 13 months old, any ideas?

I followed someone else's advice and hooked my phone to my laptop, while on. Then I powered it down. When it was turned off, I unplugged it from my laptop and then powered it on. It turned off after that no problem.