Restore iPhone error code 2015

Hi Pinkpocketbooks,

Thanks for connecting with us here in Apple Support Communities. You're on the right path of attempting to restore your son's iPhone after forgetting the passcode. Please follow the steps in this article as it may help to resolve the issue you're facing. See: If you see an error when you update or restore your iPhone, iPad, or iPod - Apple Support

Learn what to do if you see an error code or alert when you use your computer to update or restore your device.

Update your Mac or PC

Update your Mac. Or if you have a PC, get updates from Microsoft. If you're using iTunes, make sure that you have the latest version of iTunes.

Plug your device directly into your computer

Plug your iPhone, iPad, or iPod directly into your computer's USB port (not into an attached keyboard or USB hub). Make sure that the cable is in good condition.

Make sure that your device is unlocked. If prompted, trust your device.

If you still see an error alert, try a different Apple USB cable or switch to a different USB port on your computer.

Restart your computer and your device

Turn off your computer, then turn it on again. Next, restart your device.

Learn how to restart your iPhone, restart your iPad, or restart your iPod touch.

Check your computer’s security software

You might need to update, change, or uninstall software that could be interfering with your computer's connection with iTunes.

Use a different computer

Update or restore your device on another computer that uses a different network.

Kind regards.