Help with jailbreaking and Cydia for iPhones, iPads, and iPod touches.

Pangu provides an iOS 9.0 untethered jailbreak. TaiG provides an iOS 8.4 and 8.3 untethered jailbreak.
Check @PanguTeam, @taig_jailbreak, @saurik, and /r/jailbreak for news and updates.
You can use Cydia Impactor if you need to un-jailbreak an 8.1-8.4 device without restoring.
Instructions for jailbreaking iOS 8.0-8.4.
Before asking a question, check Frequently Asked Questions to find quick answers!
How to fix some mysterious problems.

I have an iPhone 3G with 4.1 iOS installed and 6.15.00 baseband. How can I upgrade to 4.2.1 without error 1015 or that will work successfully.

asked 21 Feb '11, 18:55

reV17's gravatar image


If you get error 1015, you can get out by using iReb (second tab has a fix for 1015) or from TinyUmbrella "Exit Recovery Mode" button.

iTunes is writing the firmware first, once done iTunes will attempt to write the baseband but it stops when it finds a higher version (6.15.00) instead of the (5.15.xx) that comes with the 4.2.1 ipsw file and when it stops for this reason it will give the error 1015 or 1013, however the firmware has already been written to the phone, you just need to exit the recovery mode using one of the two methods above (iReb or TinyUmbrella).

The safer method is to use a custom ipsw firmware file (cfw), this firmware would be customized by removing the baseband part in it and so averts the situation for iTunes error generation, you can customize a firmware using sn0wbreeze (Windows) or PwnageTool (Mac).


answered 22 Feb '11, 00:52

knightz4u's gravatar image


Use a custom 4.2.1 ipsw,cannot restore to stock firmware any more because of ipad baseband.


answered 21 Feb '11, 19:04

venusanann's gravatar image


Your answer: (please use the "add new comment" button unless you are actually answering the original question)
toggle preview

Markdown Basics

  • *italic* or _italic_
  • **bold** or __bold__
  • link:[text]( "Title")
  • image?![alt text](/path/img.jpg "Title")
  • numbered list: 1. Foo 2. Bar
  • to add a line break simply add two spaces to where you would like the new line to be.
  • basic HTML tags are also supported



Asked: 21 Feb '11, 18:55

Seen: 5,263 times

Last updated: 22 Feb '11, 00:52

JailbreakQA is by chpwn and comex.
About JailbreakQA. Powered by OSQA.