iphone 4, 4.0.2 ......1.59 baseband question..

[militant]

After reading a bunch about the jailbreak / unlock deal I'm still confused...ive got an iphone 4 w/ 4.0.2 my baseband is 1.59.....what can I do to be able to unlock? If I'm not mistaken I read about using tiny umbrella when I update to 4.1 to retain my 1.59 baseband...then I can jailbreak once greenpoison is out...but how will I go about unlocking?

[amazad]

I had an iphone 4 4.0.2 that I upgraded through umbrella to 4.1 whiel preserving the baseband.

Now all I do is wait for the jailbreak tool and then I use ultrasn0w to unlock 01.59.00 baseband that I have.

[Simon]

The Firmware Umbrella

Updating with tiny umbrella to preserve your baseband is detailed here