Hi, I had previously jailbreak my iphone using guide by David to version 2.2 (5G77) , carrier 2.9, modem firmware 02.28.00. Honestly i did it blindly(just following instruction) and installed many 3rd party application (also blindly following instruction) and my iphone is working fine untill now.

If im to update my phone to OS 3.0, does that means i have to restore everything and jailbreak again and install back my 3rd party application? ( very time consuming)

can i just update to OS3 by using itune 8.2 straight away?

the reason for me to update here is to use the SMS, MMS so i can delete the bitesms and also hoping that it can run a bit faster than now..... or will that be the other way round in reality?

thanks very much for the help

yes im using a unlock set from Optus australia.

Thanks, will try to do the whole process again, thanks.

got problem guys.........jailbroken my 3G to OS3 today using redsnow. now try to put my celcom 3g simcard into the phone and trying to update things with Cydia but it shows no internet connection at all. it shows(Unable to Load, no internet connection)

The 3G signs and signal is there all time but just cannot connect to internet....last time when still in 2.2 everytime i need internet in iphone i just put my celcom 3G simcard and it work fine.......... what happen?!@!!!!!!