Q: Problem with iPhone 6 after downloading IOS9. My iPhone is not working anymore (error53 coming on the screen). My Mac is updated (iTunes, OS X...); I am in Senegal for the moment and can't find a solution. Please help me!

Hey there cdpd,

I see that you are having some issues with your iPhone and are receiving an error 53 error code. I have an article for you with some information about addressing that issue, and it can be found below:

Check for hardware issues

Errors: 1, 3, 11, 12, 13, 14, 16, 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 53, 56, 1002, 1004, 1011, 1012, 1014, 1667, or 1669.

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.

If you still see the error message, check for outdated or modified software.

Get help with iOS update and restore errors - Apple Support

https://support.apple.com/en-us/HT204770

Thanks for using the Apple Support Communities. Have a good one!