I picked up a brand new iPhone 6+ 64gb for my niece last night at Best Buy. The phone is the Verizon model. We upgraded the phone to iOS 8.4, accepted the Carrier Update prompt, and restored the phone from her most recent backup (which was done about 2 hours prior off of her old iPhone 5). About 2 hours later, she experienced a blue screen, then an immediate reboot. At the time she was using the SnapChat app. I don't know which other apps may have been open in the background. Any ideas what might have caused this? Is it something to be concerned about (i.e. - should I return the phone)? She and I talked about doing a reset and just setting up as a new phone without restoring from backup, but would rather not do so if it can be avoided. Thanks in advance.