I have had a Samsung Galaxy S7 for three years. The back of the case just began to separate. I read about the problem online and the consensus was that this is a battery problem (as per this blog). Also, there were comments that the battery could not be replaced. Some advice was to contact Samsung, however I have contacted Samsung for other items and they have not been very helpful. My bought the phone from AT&T, so I called their local store. They were of no help given the age of the phone; however AT&T referred me to Batteries Plus. I looked online and they replace cell phone batteries, even for the S7. Rather than send the phone to Samsung and be without a phone for weeks, I made an appointment at Batteries Plus. They were very knowledgeable about the phone. In one hour, they had replaced the faulty battery and repaired the back of the phone case. The cost was $69.99 or $59.99 with coupon. What a great service to get my phone fully functional again in an hour.