Download the IPSW file from Apple for 8.0.1 and just do an update by holding "Option" and clicking "Software Update" in iTunes.
You can do this even if you already installed the bad Over-The-Air-Update for your phone.
No need to do a complete restore.
You can do this even if you already installed the bad Over-The-Air-Update for your phone.
No need to do a complete restore.