Weird itunes error 21, cannot restore.
i opened my iphone(4.0.2 jailbroken) and tried to clean it... but when i turned it on, my camera wont open so i opened it again and got the error 21... since then ive been trying to restore it and end up with errors 21, 14, 1601. mostly 21.. but one time ive managed to restore it to 4.2.1 and got stuck with the jailbreak(redsn
sometimes i can get pass the restore progess bar but it suddenly reboots after 30-50%.. it gives a white screen then error 21 pops out from itunes..
sometimes the white screen has green vertical lines or blue flashing... i dont know what to do... please help me..
i also encountered error 9 but most of the error is 21...
what i do to restore:
1. plug iphone to usb (which by the way, turns on once i plug it) i cannot switch it on/off since i always end up at the recovery mode every time i turn it on... also, sometimes when i switch it on, i only get a blank black screen... no apple logo.
2. put iphone to dfu mode...
method 1: hold power and home while the iphone is on and wait unitl it shuts off and count from 1 to 7. then itunes reads it and i go with the restore process but when the phone is about to get to the apple logo screen where the wheel and progress bar shows up... its suddenly reboots and i get a white screen plus error 21 instead..
method2: same as the first one, but instead of counting 1 to 7 after the phone turns off. i rehold the home and power again and count 1 to 10 (which is the normal way in dfu mode) i also get the same results as to method 1.
i also sometimes get a kernel panic during this process...
i dont know whats wrong with my iphone... but i think it has to do with the connections or IC or something... im only a newbie.. and my phone is out of warranty. i already brought this to a repair shop and the technician said its a board problem...
please, please... i really need some help here... i tried everything and i really want my iphone back.. please...
thanks for you time in reading my post... i hope someone could help me...
check specific error code... Seems it is your computer at fault. Try what they say then get back to us. All the best.
have you tried logging off your computer and then creating a new user account, logging in and then opening itunes/iphone?
I think you are getting this error because iTunes is automatically downloading it's version of 4.2.1, you can get any custom Ipsw you like BUT you must then SHIFT +click restore to point iTunes to this software. Once you've done that you can go and find the correct jailbreak... When you updated to 4.2.1 it will have changed your baseband. This is the important factor in jb, not so much the 4.2.1!Go to settings, general, about and scroll down until you find it.... Most likely it is 5.13.2 or something like that (I'm old and forgetful) try these things and get back to us!
i'm not being funny... we really are trying to help... but have you actually done any of the things suggested by the specific error codes on the apple support link in my first answer? the reason I'm asking is that error 9/14/21 can all be caused by your security software disrupting the download. Take a good look at what you are running on your pc! disable the security and try again.
have you also tried using someone elses computer with itunes? there are lots of problems with windows xp so you need to rule this out as one of the causes...update your drivers/os
I know this is a different error but it's a good guide on ireb. ( I know you already tried it.. Sometimes it's worth doing again!) http://www.iphonedownloadblog.com/2010/0...
get a custom fw I'd try 4.1 from felixdebrun or you can get somewhere else... Just avoid using your iTunes fw.
this is it.... if this doesn't help then I'm afraid you need to take it to a shop http://forums.techarena.in/guides-tutori...
This nifty little trick has stopped all iTunes Error messages dead in their tracks. Give it a try. It worked for me after two days of trying to restore a phone in recovery mode.
Step 1. On your Mac, go to your “Applications” folder. Step 2. Now navigate to the “Utilities” folder. Step 3. Launch "Terminal". Step 4. Type "sudo nano /etc/hosts" (without quotes) and hit return. Step 5. Enter your password
Step 6. Use the down arrow key to find the “gs.apple.com” entries. Once the cursor is in front, make sure you comment out the line(s) by entering “#” in front of the text.
Step 7. Save the file by pressing CONTROL+O.
Step 8. Exit the nano editor by pressing CONTROL+X. I found ctrl X didn't exit for me, so Try "return' key after Control O to save and exit.
Step 9. Restore your iDevice. Windows: Step 1. Start –> Programs –> Accessories Step 2. Run Notepad or WordPad Step 3. Click “Open..” from File menu. Step 4. Browse to Windows/System3
and from another site
"I had the exact same problem today. Here's how I got it fixed.
I downloaded a corrupt 3.0 file and got the error 14 during install which then prompted a restore. The restore wouldn't go through because the 3.0 ipsw was corrupt. I deleted the 3.0 ipsw that I just downloaded, plugged back into iTunes, which prompted the restore, and since 3.0 was gone, it automatically redownloaded it. After that I was able to restore to 3.0 successfully.
Here's where the file is located. Delete it and then redownload and restore.
Documents and Settings\<User>
. I took my phone to the Apple store yesterday and it actually turned out to be a bad battery connection. The connector was bent, making contact but screwing up the memory. My second battery replacement on my iPhone 4. $89.00 This absolutely and instantly fixed the problem. Please let me know if this helps anyone with this problem. I just created an account so I could answer your question.The Apple guy did tell em he had to put it in UDE mode which doesn't matter a bit if you're not there getting the battery. I don't know what UDE mode is,. but I see it mentioned here a lot.To re-iterate, he said it would have done nothing for me on my own.