Picked up a 16gb 6 plus for my wife Friday. Noticed last night that it kept turning itself off during the night (this is a problem because she's often on call with the hospital). It also ranomly shuts wifi and Bluetooth off and will not let you turn it back on. Restarting the phone sometimes fixes this. Also, after it shut itself off one time, I couldn't get it powered back on by just holding the power button, I had to.hold the power and home button until it restarted. Battery is fully charged when this happens.