Chosen Solution
I have an iPhone 7+ that reboots constantly. I can’t use it for more than 10 mins max without it rebooting but it is more common for it to reboot every 2-3mins. I’ve tried restoring the phone, doing a DFU restore and replacing the battery and nothing seems to help. Anybody seen this before?
Has this phone been dropped, repaired (prior to you changing the battery) or came into contact with water recently? Likewise, have you been using a low-cost charging brick and cable? The symptoms resemble those of a water damaged device. Don’t be fooled by the fact that the iPhone 7 is water resistant…it’s not always so. A cheap charger can also damage the charging circuit which would also give you similar symptoms.