Unlocking an iPhone while under AT&T

[quentinr]

I have an iPhone that has already been jailbroken via iLiberty+ with no problems. As rumors keep building up, I am thinking about selling my iPhone prior to the WDCC keynote so I can recoup enough of my investment to purchase the 3g. Knowing that unlocked iphones go for more online than locked, I want to unlock it. The situation I have right now is that I'm on AT&T.

When unlocking via iLiberty+, is there any particular thing I need to do to avoid problems with my current carrier? For example, will certain features not work (visual voicemail?)

[onlycopunk]

No. Everything will work as if it wasn't unlocked. In fact since you will still be using ATT you wont even notice it's unlocked.

[blueflame]

jailbraking the iphone can be undone with a restore of the phone. or un-jailbrake feature in ziphone?
however, re-locking the phone from an unlock is much harder? is that right?

[onlycopunk]

No to relock, you can either use the Bootneuter.app, which the pwnage tool sticky explains a little bit about it. Or you can just restore from iTunes with Apple's firmware and that will knock it back to an out of the box state.

[taibien86]

my iphone was jailbroken with the ziphone app. the unlocking apps say that the iphone should be 3.9 bl.... what does that mean??

[quentinr]

I have two more questions. Will the iphone be still unlocked if I decide to reset it to factory settings? And what about making it compatible with TZones?