There is no cydia or ultrasn0w update to unlock iphone 4 4.3.3 baseband 4.10.01.
iPhone unlocking is becoming difficult with the release of every next baseband version. Apple has now started to hire the hackers who made jailbreak and unlocking possible too, so its going more against jailbreak fans.
However, currently, to unlock iphone 4 4.3.3 baseband 4.10.01 Gevey sim option is available.
Gevey sim lets you use the iPhone without unlocking it for any carrier. Its a hardware hack in which you use a specialized sim card which lets you connect to your cellular network provider from Apple iPhone, without official factory unlock or ultrasn0w unlocking.
Gevey sim is available in markets and online for around 50$ to 150$ (depending upon the market mainly) to unlock iPhone 4 4.3.3 baseband 4.10.01
Gevey sim did not help. I was unable to unlock IPHONE 4 baseband 4.10.01. I had got the original Gevey sim
Thanks for the feedback about gevey sim unlock BK