iphone error 21 - GSM-Forum

birdonsky · 12-01-2011, 13:18

i have iphone 3gs every time error 21 with itunes
i have read all post and made every things but same problme
only error 21
with office 4.1
custome 4.1
update with itunes
press home and power for 10 sec

all setps problem with error 21

is there any new sulotion to fix it

thanks

birdonsky · 12-01-2011, 13:58

when i try to restore it with official firmware 4.1 the phone white light on lcd and then itunes say error 21

cowen1000 · 12-01-2011, 14:02

You need to put phone in pwnd dfu usin redsn0w or ireb before you install custom firmware, that should stop the errors

software.usm · 12-01-2011, 14:10

Quote:

Originally Posted by birdonsky

i have iphone 3gs every time error 21 with itunes
i have read all post and made every things but same problme
only error 21
with office 4.1
custome 4.1
update with itunes
press home and power for 10 sec

all setps problem with error 21

is there any new sulotion to fix it

thanks

Br very easy.first open ur fon and disconnect ur battery only 1 minute,and then again apply custum or official frimware. 2nd change ur iphone cable!

atiq022 · 12-01-2011, 14:13

Use ireb and restore by custom firmware

.::SOLUTION::. · 12-01-2011, 14:22

change the battery and then restore it

Shahin Hasan · 12-01-2011, 14:48

Brother,
use iRab (make dfu mode) and change cable (use orginial Apple) then restore orginial f.w version 4.1, working 100%.

jalalmz · 12-01-2011, 17:27

change pc .. all most try with window7 and when you trying to restore the phone with itune then used in DFU mood ..... version 4.1

birdonsky · 12-01-2011, 17:56

sorry i tried all but same problem only white screen then error 21
any way thanks to all

atiq022 · 12-01-2011, 17:57

use lastest itune version

birdonsky · 12-02-2011, 22:33

i have used last version also same error
but some time windows show usb error faster than usb2 i think is it hardware problem

rich_festamk3 · 12-02-2011, 22:59

i have same problem. one one pc it gives 16xx errors on the other is error 21 in all modes

birdonsky · 12-14-2011, 19:43

i still have tis problem and sure sulotion herer

birdonsky · 12-14-2011, 21:26

sorry i have did all these things but no sulotion
1- change cable , pc , reinstall itunes,
2- change battery ( without battery for 1 hours)
3- restored it with custome firmware 4.1
4 restore it with official firmware
5- update it with itunes
6 use tiny to tick out from dfu mode
7- use other software also to get out from dfu mode no way

if some one has other idea to help

thanks in advance

Wites OM Tesla · 12-14-2011, 22:15

Quote:

Originally Posted by birdonsky

sorry i have did all these things but no sulotion
1- change cable , pc , reinstall itunes,
2- change battery ( without battery for 1 hours)
3- restored it with custome firmware 4.1
4 restore it with official firmware
5- update it with itunes
6 use tiny to tick out from dfu mode
7- use other software also to get out from dfu mode no way

if some one has other idea to help

thanks in advance

Phone after what dropped or water damaged?

12-01-2011, 13:18	#1 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	iphone error 21 i have iphone 3gs every time error 21 with itunes i have read all post and made every things but same problme only error 21 with office 4.1 custome 4.1 update with itunes press home and power for 10 sec all setps problem with error 21 is there any new sulotion to fix it thanks

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12-01-2011, 13:58	#2 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	when i try to restore it with official firmware 4.1 the phone white light on lcd and then itunes say error 21

12-01-2011, 14:02	#3 (permalink)
cowen1000 Freak Poster Join Date: Mar 2008 Posts: 382 Member: 731613 Status: Offline Thanks Meter: 67	You need to put phone in pwnd dfu usin redsn0w or ireb before you install custom firmware, that should stop the errors

12-01-2011, 14:13	#5 (permalink)
atiq022 No Life Poster Join Date: Sep 2007 Location: morocco Posts: 587 Member: 587405 Status: Offline Sonork: 100.1681610 Thanks Meter: 151	Use ireb and restore by custom firmware

12-01-2011, 14:22	#6 (permalink)
.::SOLUTION::. No Life Poster Join Date: Sep 2011 Location: Bhutan Posts: 854 Member: 1653223 Status: Offline Sonork: 100.1619309 Thanks Meter: 146	change the battery and then restore it

12-01-2011, 14:48	#7 (permalink)
Shahin Hasan No Life Poster Join Date: Mar 2011 Location: Amman, J o r d a n. Age: 43 Posts: 807 Member: 1529244 Status: Offline Sonork: 1720 Thanks Meter: 150	Brother, use iRab (make dfu mode) and change cable (use orginial Apple) then restore orginial f.w version 4.1, working 100%.

12-01-2011, 17:27	#8 (permalink)
jalalmz Insane Poster Join Date: May 2007 Location: brazil Posts: 98 Member: 499010 Status: Offline Thanks Meter: 11	change pc .. all most try with window7 and when you trying to restore the phone with itune then used in DFU mood ..... version 4.1

12-01-2011, 17:56	#9 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	sorry i tried all but same problem only white screen then error 21 any way thanks to all

12-01-2011, 17:57	#10 (permalink)
atiq022 No Life Poster Join Date: Sep 2007 Location: morocco Posts: 587 Member: 587405 Status: Offline Sonork: 100.1681610 Thanks Meter: 151	use lastest itune version

12-02-2011, 22:33	#11 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	i have used last version also same error but some time windows show usb error faster than usb2 i think is it hardware problem

12-02-2011, 22:59	#12 (permalink)
rich_festamk3 Freak Poster Join Date: Jan 2005 Posts: 153 Member: 105136 Status: Offline Thanks Meter: 1	i have same problem. one one pc it gives 16xx errors on the other is error 21 in all modes

12-14-2011, 19:43	#13 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	i still have tis problem and sure sulotion herer

12-14-2011, 21:26	#14 (permalink)
birdonsky No Life Poster Join Date: Jan 2011 Location: on the earth Posts: 788 Member: 1491073 Status: Offline Sonork: 100.1608050 Thanks Meter: 49	sorry i have did all these things but no sulotion 1- change cable , pc , reinstall itunes, 2- change battery ( without battery for 1 hours) 3- restored it with custome firmware 4.1 4 restore it with official firmware 5- update it with itunes 6 use tiny to tick out from dfu mode 7- use other software also to get out from dfu mode no way if some one has other idea to help thanks in advance