Fix iTunes error (-1) – iPhone could not be restored unknown error 1

+3 votes
asked Nov 6, 2015 by Stephan

My iPhone 5 is stuck at connect to iTunes logo and when I try to restore it, everything goes fine till around 70% then I got a error in iTunes “iPhone could not be restored unknown error 1”. It has never been jailbroken.

fix iphone error 1

What I tried:

DFU Mode – still error 1

Shift + Restore – still error 1

Another USB cable – error 1

Another Computer – error 1

Changed Battery – again error 1

Please help me to fix error 1 on my iPhone 5 GSM model from AT&T US.

1 Answer

0 votes
answered Nov 6, 2015 by ihelpadmin (19,980 points)
Best answer

The iTunes error -1 is mostly related to a hardware issue. To fix the iTunes error (-1) you need to try the methods below:

  • Try to Restore with Certified Apple Cable.
  • Use Latest iTunes Version - You can download from official website.
  • Update your PC / Mac.
  • Reinstall the iPhone drivers.
  • Check if your security software is blocking the connection between your device and Apple's server.
  • Try to restore your device without the digitizer (disconnect the display screen).
  • Contact Apple Support here.

Please reply here in comment if you have solved the iTunes unknown error 1 on your device.