Phone Keeps Turning Off
My wifes ip4 keeps turning itself off. Searched for solutions and tried holding home+lock for 15 seconds and nothing, did the same while connecting it to computer, and nothing. The phone will turn on if connected to the wall charger but then turns itself off again shortly after being disconnected. Battery says 100% when it comes off the charger. The phone is only 1 month old, brand new from the carrier. Hasn't been dropped, hasn't been near water, and has been in an otterbox case from minute 1.
Any help would be appreciated. Thanks