I don’t actually have an answer but just want to say that this is the second iPhone 7 plus in my household to have this same problem. Is there any report/findings on this flaw - does it particularly happen to iphone 7 plus? If it’s not the manufacturer’s fault then was it the customer’s usage - and if so are there any tips to avoid having the battery expand this way.
I do notice that both phones with this problem are the ones that we have on standby after getting a newer phones. Is it the lack of activity that causes the battery problem.
Thanks