Aporte original por: Ben ,
It's certainly hardware if you tried a DFU restore. I couldn't fix it because baseband chip went bad. I'm not sure reflowing it would help. What I do after that is do a bare bones test which is unplug front camera, rear camera, home button extension cable. And plug in another battery if you have one. Then I use 3UTools to try doing a restore. Are you getting iTunes error -1 / -9? Sounds like it's trying to flash or update the baseband as I think that's what it does last on the software update. It will show this during 3UTools software restore.