Developer Steve Troughton-Smith has tweeted that customers of Three in Ireland and the UK and China Unicom in China woke up today and found that that Cydia on their devices was blocked by the carrier. So, now the jailbroken devices don’t have access to certain content from Cydia when on the Three and China Unicom networks. Though, only main page is unavailable. Moreover, Cydia is blocked over 3G networks that means that the popular store still available via Wi-Fi.
Here are download links for the latest versions of software for iPhone, iPod Touch and iPad jailbreaking, activating and unlocking:
iFaith 1.4.2 (Windows tool that will save SHSH keys for your current installed iOS)
Current version is ultrasn0w 1.2.3, download in Cydia (unlock for iPhone 4, iPhone 3GS, iPhone 3G, firmwares 3.0-4.3.3; it supports basebands 01.59.00, 04.26.08, 05.11.07, 05.12.01, 05.13.04, 06.15.00)
You can download older software versions