Chosen Solution

i got an iPhone 4s which stucks on boot loop after software update to 8.3. I plugged in a new Battery but it will not boot. But if i unplug the battery and leave the cable plugged in, it boots in bootloop. Anybody here, who got the same or similiar issue?

I think you have a corrupted install and you need to repair your firmware. So if I were you, I’d put the old battery back and restore the phone. The easy way, try it first:

  • Download and install the latest version of iTunes on your laptop (new version just out now);
  • Turn off your iPhone;
  • Press and hold Home Button;
  • While pressing Home Button, connect your iPhone to your computer using a known good sync/charge cable;
  • Your phone should turn ON and show you “connect to iTunes,” while iTunes will tell you that it “detected an iPhone in restore mode;”
  • You will be prompted to download and restore your firmware. Accept and leave your iPhone undisturbed until the process is over and your iPhone starts fresh. NOTES:
  • If you iPhone’s Wi-Fi was not working properly before the initial update to 8.3 that caused this issue, then there is a high probability that the new restore will fail as well and your phone will remain stuck on restore. Let us know of that’s the case; there could be a remedy;
  • All your data will be erased, hope you have a back-up somewhere;
  • You’ll need your Apple ID and password to unlock your iPhone, if activation lock was ON (Find My iPhone ON) before the restore.