Q: what if my iphone has been restored and has had a dfu and also has been seen and cant find a cause what do i do ??

PLEASE HELP I HAVE DONE ALL T=OF THE APPLE CARE STEPS AND STILL HAS NOT DONE ANY GOOD I HAVE DONE A DFU A RESTOR AND ALSO A ERASE AND RESET AND A RESET ALL SETTINGS AND ALSO A RESET NETWORK SETTINGS WHAT DO I DO AND IT WILL NOT HOLD A CHARGE