|Jul 24, 2010, 03:44 PM||#1|
Help, Cant restore iphone 3GS, unknown error 21
When attempting to synch my Iphone 3GS i was prompted to update the OS to 4.0.1. During the installation an error message appeared, unknown error 21 was given as the reason. After this the iphone has apparently entered 'recovery mode' and needs to be restored before it can be used again. However when i try to restore it it gives the unknown error 21 and doesnt complete the task. I was initially using ITunes 9.2.1 and have tried to restore on a different computer with another version of itunes but get the same error message. Looking up error 21 apple seems to suggest this is an error that occurs with anti virus software interfering but i am not running any anti virus software that i am aware of.
Can anyone help or have i bricked my iphone?
|Aug 3, 2010, 06:39 PM||#2|
Hi, Using a PC you need to produce a new account with admin settings. Then run Itunes and as you are a new user it reconfigures Itunes. Plug in your iphone and restore as normal.
I then went back to my normal account and restored from backup.
Works a treat!
|Thread Tools||Search this Thread|
|thread||Thread Starter||Forum||Replies||Last Post|
|iPhone 3Gs cannot be restored: Unknown error (1)||figihone||iPhone Tips, Help and Troubleshooting||0||Feb 23, 2014 09:44 AM|
|iphone cannot restore unknown error 9 ?||DBZmusicboy01||iPhone||7||Feb 13, 2014 12:29 AM|
|[iPhone5] Restore = Unknown error 1||epigram||iPhone Tips, Help and Troubleshooting||8||Oct 30, 2013 01:53 PM|
|iPhone 3GS restore error (-1)||amalprasad||iPhone Tips, Help and Troubleshooting||12||Dec 1, 2012 11:24 PM|
|iPhone: Restore Error on iTunes (Unknown Error 1)||core2kid||Jailbreaks and iOS Hacks||4||Sep 9, 2012 06:51 PM|
All times are GMT -5. The time now is 03:44 AM.