IPhone shuts down whenever I try to crop a photo?

It only happens with screen shots. Why is this? My battery percentage is going sort of fast too. I have heard people having the same problem. What do I do

A lot of people are having it, sadly I didn't know that and ordered a new phone. You can call the Verizon company and they might offer to send you a new one if you send them your old phone for free.

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