My ipone won't update it saying error

Hello Farag,

It sounds like you are unable to update your phone in iTunes. I recommend following the following article to help troubleshoot the issue:

Resolve iOS update and restore errors in iTunes

http://support.apple.com/kb/ts1275

If you are getting a specific error message then you can use the following to find the error and resolve it:

Resolve specific iTunes update and restore errors

http://support.apple.com/kb/ts3694

Thank you for using Apple Support Communities.

Cheers,

Sterling