the iPhone "iPhone" could not be restored,unknown error occuerd(20) - GSM-Forum

meisam · 11-05-2008, 11:41

Hi to all;
I got the following error:
the iPhone "iPhone" could not be restored,unknown error occuerd(20)
When i press power key,it shows empty battery and when connect to pc i see itune logo and usb cable,when i try to restore i get the error.plz help.

zoki · 11-05-2008, 12:35

You must put phone in dfu mode,and the try.If you have again error 20,then change pc.

meisam · 11-05-2008, 14:42

This is just my problem,i can't take this phone to dfu mode,how can i do it manually?

byteforce · 11-05-2008, 14:43

I have the same error. The customer accidentally upgraded the iPhone to latest version and now I can restore the iPhone anytime I wish to version 2.0, but no to v1.1.4. The question is can I unlock the version 2.0 (because I am unable till now to downgrade the iPhone to v1.1.4)?

BR

byteforce · 11-05-2008, 14:47

Me too, I had big problems putting this upgraded iPhone to recovery or DFU mode. Also I was unable to shut it down. But trying with ziphone and iLiberty and all the programs, I suceeded in putting this iPhone to recovery mode, and now I can restore the iPhone anytime I wish to version 2.0, but no to v1.1.4

Quote:

Originally Posted by meisam

This is just my problem,i can't take this phone to dfu mode,how can i do it manually?

gjurobrod · 11-05-2008, 14:52

Sure you can unlock it,just restore it to 2.1.0 and use quickpwn 2.1 for unlock.

BR

meisam · 11-05-2008, 15:14

Now i got to know the real problem:

Apple Recovery (iBoot) USB Driver

i checked carefully In device manager and realized that this device is having problem.How to solve it plz?

meisam · 11-05-2008, 15:16

Now i got to know the real problem:

Apple Recovery (iBoot) USB Driver

i checked carefully In device manager and realized that this device is having problem.How to solve it plz?

malikkk · 11-05-2008, 15:38

uninstall itune complete
restrat pc
install again itune 8.0
change usb port
restore your iphone with 2.1
and use quickpwn 2.1

byteforce · 11-05-2008, 18:15

I am still experiencing difficulties unlocking this iPhone with quickPwn 2.1. I am following exactly the instructions given by quickPwn, but at the end quickPwn displays the attached message:

shedeed · 11-05-2008, 19:33

Remove U Itunes And Install It Again Then Put U Iphone IN D.F.U Mode Then
Try To Restore It Again

hombreasiano · 12-01-2008, 00:13

hi does the quickpwn21 work for the 1st generation iphone. I get the same problem. a friend updated the laster version and now can't downgrade. thanks.

11-05-2008, 11:41	#1 (permalink)
meisam No Life Poster Join Date: Feb 2005 Location: IRAN(land of heros) Age: 44 Posts: 2,680 Member: 115172 Status: Offline Thanks Meter: 212	the iPhone "iPhone" could not be restored,unknown error occuerd(20) Hi to all; I got the following error: the iPhone "iPhone" could not be restored,unknown error occuerd(20) When i press power key,it shows empty battery and when connect to pc i see itune logo and usb cable,when i try to restore i get the error.plz help.

11-05-2008, 12:35	#2 (permalink)
zoki No Life Poster Join Date: Apr 2001 Location: Macedonia Age: 49 Posts: 1,323 Member: 4123 Status: Offline Thanks Meter: 27	try this You must put phone in dfu mode,and the try.If you have again error 20,then change pc.

12-01-2008, 00:13	#12 (permalink)
hombreasiano Junior Member Join Date: Dec 2008 Posts: 1 Member: 913770 Status: Offline Thanks Meter: 0	iphone 1st generation hi does the quickpwn21 work for the 1st generation iphone. I get the same problem. a friend updated the laster version and now can't downgrade. thanks.

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11-05-2008, 14:42	#3 (permalink)
meisam No Life Poster Join Date: Feb 2005 Location: IRAN(land of heros) Age: 44 Posts: 2,680 Member: 115172 Status: Offline Thanks Meter: 212	This is just my problem,i can't take this phone to dfu mode,how can i do it manually?

11-05-2008, 14:43	#4 (permalink)
byteforce Cheater -Don't Deal with him- Join Date: Feb 2003 Location: gsmcity Age: 44 Posts: 3,009 Member: 21296 Status: Offline Thanks Meter: 328	I have the same error. The customer accidentally upgraded the iPhone to latest version and now I can restore the iPhone anytime I wish to version 2.0, but no to v1.1.4. The question is can I unlock the version 2.0 (because I am unable till now to downgrade the iPhone to v1.1.4)? BR

11-05-2008, 14:52	#6 (permalink)
gjurobrod No Life Poster Join Date: Dec 2003 Location: Wien,Austria Posts: 906 Member: 45985 Status: Offline Thanks Meter: 96	Sure you can unlock it,just restore it to 2.1.0 and use quickpwn 2.1 for unlock. BR

11-05-2008, 15:14	#7 (permalink)
meisam No Life Poster Join Date: Feb 2005 Location: IRAN(land of heros) Age: 44 Posts: 2,680 Member: 115172 Status: Offline Thanks Meter: 212	Now i got to know the real problem: Apple Recovery (iBoot) USB Driver i checked carefully In device manager and realized that this device is having problem.How to solve it plz?

11-05-2008, 15:16	#8 (permalink)
meisam No Life Poster Join Date: Feb 2005 Location: IRAN(land of heros) Age: 44 Posts: 2,680 Member: 115172 Status: Offline Thanks Meter: 212	Now i got to know the real problem: Apple Recovery (iBoot) USB Driver i checked carefully In device manager and realized that this device is having problem.How to solve it plz?

11-05-2008, 15:38	#9 (permalink)
malikkk No Life Poster Join Date: Apr 2005 Location: HEART BEATS Age: 37 Posts: 2,200 Member: 141675 Status: Offline Thanks Meter: 7,641	uninstall itune complete restrat pc install again itune 8.0 change usb port restore your iphone with 2.1 and use quickpwn 2.1

11-05-2008, 19:33	#11 (permalink)
shedeed No Life Poster Join Date: Jun 2007 Location: E G Y P T Age: 37 Posts: 2,527 Member: 527884 Status: Offline Sonork: 100.1583794 Thanks Meter: 850	Remove U Itunes And Install It Again Then Put U Iphone IN D.F.U Mode Then Try To Restore It Again