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.

Hey all,

I recently moved from Canada to New Zealand. I was using Rogers as a carrier in Canada and have just bought a Telecom SIM card. I went through the redsn0w jailbreak and installed Cydia. I unlocked it with ultrasn0w. The problem is, when I insert my new NZ SIM card I get a notification saying "Invalid SIM", followed by a big ole NO SERVICE. Any help would be appreciated. Let me know if anyone has any answers.


asked 21 Jan '13, 02:26

danosh84's gravatar image


what is the modem firmware of the iphone?

settings > general > about > modem firmware

(21 Jan '13, 02:28) WalterWhite WalterWhite's gravatar image

unless your baseband is 01.59.00 ultrasn0w will not unlock an iphone 4


answered 21 Jan '13, 02:28

theiphoneguy's gravatar image

theiphoneguy ♦

Yeah, I heard something about that. Wasn't sure if it was a good idea. Does downgrading your baseband adversely affect anything on your phone? And how do I go about downgrading my baseband?


(21 Jan '13, 17:37) danosh84 danosh84's gravatar image

you can not downgrade an iphone 4 baseband

(25 Jan '13, 09:26) WalterWhite WalterWhite's gravatar image

Buy an official unlock is better. You can use any carrier forever even you upgrade or restore


answered 25 Jan '13, 08:38

Answers%20to%20iPhones's gravatar image

Answers to iPhones

Buy official unlock from original carrier not so expensive and it's permenant you can upgrade and downgrade.


answered 26 Jan '13, 00:18

Tomas97'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 Jan '13, 02:26

Seen: 1,348 times

Last updated: 26 Jan '13, 00:18

Related questions

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