Ahuvami
Level 1
(4 points)
iPhone
Q: Iphone 4 dosent turn on
When I charge the phone I have the apple sign
When I connect to i tunes to restore the phone i get a messege of serial number dosent exist and error code 21
what can i do?
iPhone 4S
by Carolyn Samit,Apple recommended
Carolyn Samit
Level 10
(124,341 points)
Apple Music
Check for hardware issues
If you see error 53, learn what to do. If you see one of the errors below, you might have a hardware issue:
- 1, 3, 10, 11, 12, 13, 14, 16
- 20, 21, 23, 26, 27, 28, 29, 34, 35, 36, 37, 40, 56
- 1002, 1004, 1011, 1012, 1014, 1667 1669
Here's what to check:
- Make sure that you have the latest version of iTunes.
- Check for issues with third-party security software.
- Make sure that your USB cable, computer, and network are reliable. Then try twice more to restore your iPhone, iPad, or iPod.
- If you still see the error message, you can check for outdated or modified software or contact Apple Support.
Above information from here > Get help with iOS update and restore errors - Apple Support
