iOS 4.1 for iPhone 3G

[Eldiablojoe]

I know that the 4.2 iOS is out now, but I was wondering if I could get my jailbroken and unlocked iPhone 3G updated to 4.1 and then re-jailbreak and unlock it so I can use it on T-Mobile (Like I'm doing now) but now with updated firmware.

 

[goobot]

The 4.1 bb isn't unlockable right now. So just wait. Tho if in cydia it says u have ur 4.1 shsh yes u can

 

[Applejuiced]

Yes, like said above if you update to official 4.1 you will lose your unlock and your Tmobile sim wont work.
You can update to a custom JB 4.1 IPSW created with pwnage tool so you can maintain your baseband and stay unlocked.