kickstar anything yet on incomming mms? can send out by not incomming
Latest redsn0w http://is.gd/buMgi
should fix any APN/MMS issues (remember to deselect Cydia if it's already installed)EDIT:
Apple has released OS 4.0.1 to address signal calculation issues for the iPhone 3G/3GS/4.Redsn0w and Ultrasn0w will still work
After you update to OS 4.0.1 you can use redsn0w 0.9.5 to jailbreak 4.0.1 on iPhone3G. Just point it at the 4.0 IPSW
(Yes – point it at the 4.0 IPSW even though you're at 4.0.1).
This will also hacktivate your iPhone3G at 4.0.1 if you haven't already been activated by iTunes. Install ultrasn0w if you need a carrier unlock (and in the USA, remember to turn off 3G mode in Settings→General→Network).