My iPhone 7 started this fun thing with the last 10.2 update....it will shut down regardless of how much charge is left on the phone. At first it was acting like the 30% bug...shutting off around 30-35%. Then it started happening at completely random times...with 60% charge....88%....even with 100%! When it shuts down, it displays the empty battery symbol with a lightening cable telling me the battery is dead. I plug it in and amazingly it still has whatever percentage left before it shut off. I have done a full restore with a fresh download of iOS 10.2 (deleting the old .ipsw file) and set it up as a new phone. This has not stopped it. What the hell is going on with my phone?