itunes retore 1015 please help

A 1015 error usually indicates that the iPhone has been jailbroken. If your iPhone has indeed been jailbroken, you will have to look for help elsewhere. Since Apple does not support jailbreaking, we can provide no assistance in these forums.

Regards.

so what i do

If your iPhone has been jailbroken, we cannot help you here. You're on your own.