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

Question

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.

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.

Answer 1

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.