T68i & GPRS internet

[kfchan]

I'm having some trouble getting my Sony Ericcson T68i working with my 
iBook. Pairing is fine. The problem is using the phone to access the 
internet on the road via the phones GPRS capability. My mobile carrier 
is optus, but internet provider is iinet. Does the dialup have to be 
the Optus dialup, or the iiNet dialup.

There are some support articles @ 
http://www.info.apple.com/usen/bluetooth/

however they offer only very general solutions, mainly focusing on 
pairing and syncing.

TIA,

Ken