Chosen Solution
I bought a 128GB iPhone SE for $20 & it was constantly restarting. I changed the battery with an iFixit unit, it worked perfectly for a few hours until then next day, when it started doing it again. What should I look for/check?
Maybe try restoring it? or do a hard reset by holding the power + home at the same time until it restarts. or try reseating the display connectors. if it doesn’t work, then you got a logic board problem.
