Unlock carriers on iphone 4?

I have jailbrokern our iphone 4
ultrasn0w has been installed but our Vodaphone sim card is still not accepted.

Do you know how ot unlock the handset?

Only baseband 1.59.00 can be unlocked.
all other baseband only the carrier can be unlocked.

You can Unlock I-phone 4 easily. To Unlock it use Remote Unlock service… Instead of using the Ultrasn0w you can use I-tunes with remote unlock service and unlock it… You can get Remote unlock service at http://www.classicunlocking.com/apple-iphone-4/rs17wp9/ and unlock it easily. Then use Vodafone or any GSM Network sim card… You need to specify the network, country it locked now and get the remote unlock service, Unlock it.