itunes give me message error 53 in update iphone 6 to ios 8.3 ????

Hello, stivefoin.

Thank you for visiting Apple Support Communities.

I understand that you are unable to update your iPhone and received an error 53. Here are the troubleshooting steps that I would recommend going through for this error.

Check for hardware issues

Related errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.

These errors mean that your device or computer might have a hardware issue that stops the update or restore from completing.

1. Check that your security software and settings aren't blocking your device from communicating with the Apple update server.
2. Then try to restore your iOS device two more times while connected with a cable, computer, and network you know are good.
3. Make sure that your security software and settings are allowing communication between your device and update servers.
4. If you still see the error message when you update or restore, contact Apple support.

Get help with iOS update and restore errors

Cheers,

Jason H.