PPCGeeks Forums HTC Arrive HTC HD2 HTC Thunderbolt HTC Touch Pro 2 HTC Evo 4G HTC Evo 3D Samsung Galaxy S II Motorola Droid X Apple iPhone Blackberry
Go Back   PPCGeeks > iPhone > GSM iPhone Development

Notices



User Tag List

Closed Thread
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 09-03-2010, 08:38 PM
Squirrel240sx's Avatar
Lurker
Offline
Pocket PC: Verizon Touch Pro 2
Carrier: T-Mobile
Location: Louisiana
 
Join Date: Sep 2009
Posts: 8
Reputation: 0
Squirrel240sx is a n00b
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Send a message via AIM to Squirrel240sx
sorry, probably a dumb question

i tried searching all over but maybe i'm searching for the wrong thing
my iphone 3g was downgraded to 3.1.3 from 4.0 (too laggy) and now won't allow me to install ANY other firmware. i've tried 4.0.2, 4.0.1, 3.1.2, and the phone just reboots when i try upgrading in itunes. after the process it's still on 3.1.3 and itunes gives me error 21 could not complete upgrade or whatever. thoughts?

it also gave me problems when jailbreaking 3.1.3. redsn0w wouldn't work, it would just reboot to a black "off" screen when i tried putting it in dfu mode during the jb process and be stuck there until i did a restore in itunes. i had to use a friend's sim card to get past the activation screen and jb over at jailbreakme.com. i'm just a little confuzzeled. coming from a touch pro 2 which, imo, was extremely easy to unlock & upgrade. i don't get all this iCrap.
__________________
Device: Rhodium_W
Radio: 2.23.00WU
Rom: MightyRom WWE
  #2 (permalink)  
Old 09-04-2010, 11:13 AM
schettj's Avatar
morsus mihi
Offline
Pocket PC: iPhone 4
Carrier: AT&T
Location: Not from around these parts
 
Join Date: Oct 2006
Posts: 3,017
Reputation: 3616
schettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIPschettj is still contributing even after becoming a VIP
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Re: sorry, probably a dumb question

Why did you fsck with it if you don't understand what you're doing?

My guess is you borked the downgrade. Are you trying to upgrade from Mac or PC?

Try putting it in DFU mode, and restoring the desired firmware, from a NEW user account on your Mac/PC.

DFU mode: http://iphoneindia.gyanin.com/2009/1...toring-iphone/

The "fix" for error 21
http://forums.macrumors.com/showthread.php?t=975858
http://discussions.apple.com/thread....ageID=11723151

Here let me google that for you: http://www.google.com/search?q=iphon...pdate+error+21
__________________
  #3 (permalink)  
Old 09-04-2010, 01:01 PM
Squirrel240sx's Avatar
Lurker
Offline
Pocket PC: Verizon Touch Pro 2
Carrier: T-Mobile
Threadstarter
Location: Louisiana
 
Join Date: Sep 2009
Posts: 8
Reputation: 0
Squirrel240sx is a n00b
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Send a message via AIM to Squirrel240sx
Re: sorry, probably a dumb question

I'm on a pc. Thanks for the info. I'm pretty sure i did the downgrade correctly. I followed the instructions for that exact and used recboot to get past the 1015 error code. That all worked fine other than redsn0w not working to jailbreak. But jailbreakme.com worked great so not a big deal, I guess.
I searched all over google for error 21 and all I came up with was the stupid apple help page suggesting antivirus which is obviously not the problem and threads where ppl asked the same question but got no replies. Guess I didn't look deep enough. I usually give up after I go through more than 5 or 6 pages of google and don't find what I'm looking for.
I'm not new to messing with smartphones, just new to iPhones.

Last edited by Squirrel240sx; 09-04-2010 at 01:09 PM.
  #4 (permalink)  
Old 05-26-2011, 02:14 PM
matticrew's Avatar
Lurker
Offline
Pocket PC: droid
Carrier: verizon
 
Join Date: Oct 2010
Posts: 1
Reputation: 0
matticrew is a n00b
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Re: sorry, probably a dumb question

i have had error 21 be a battery before , many times
Closed Thread

  PPCGeeks > iPhone > GSM iPhone Development

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


All times are GMT -4. The time now is 03:59 AM.


Powered by vBulletin® ©2000 - 2019, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
©2012 - PPCGeeks.com