How To: Install new Cydia on your iOS device without the need to upgrade to 4.2.1

Cydia update has now arrived by saurik and his helper chpwn to version 1.0.3366-1 for all iOS iPhone, iPod touch and iPad. The new Cydia is more faster and lots of bugs fixed, iPhone Dev Team has already used cydia with new version of Redsn0w 0.9.6b4 on iOS 4.2.1. if you need Cydia 1.0.3366-1 on your iOS 4.1 or older version you can update it by following below guide.

COMEX CONFIRMS IOS 4.2.1 UNTETHERED JAILBREAK RELEASE BEFORE CHRISTMAS 2010

Comex of Spirit and JailbreakMe fame has confirmed that a more efficient userland-based untethered jailbreak method for iOS 4.2.1 will be released before Christmas 2010. This confirmation in fact came before MuscleNerd got abackup method to make jailbreak untethered on iOS 4.2.1.

Cannot connect to iTunes store while trying to update an app

Ok today's fix is faced by a lot of people on all iDevices (iPhone, iPad, and iPod) this problem occurs sometimes when you try to update an app through the app store and although you enter the correct credentials still you get this problem.

Misconceptions:
1- That this problem is caused by carrier restrictions.
2- That this problem is caused by 3G or WiFi.
3- That this problem is caused by the latest update or backup you made.
4- That this problem is caused by the jailbreak or unlock.