GPRS CSD Line Type

[slamma]

I have flashed my Australian O2 XDA with WM2003 4.00.10 and RSU 4.21. I am with Optus and have been able to connect with GPRS (all be it slow but tolerable, bearly) but I have noticed that the CDS line type setting only has 4 settings, all of which are 9600 bps. Shouldn't this be higher? If so how do I get it higher?

Thanks for any help.

 

[slamma]

Update...
Just looked thru the ROM updates section and noticed there is now an Asian RSU 4.21 (07/30/2003)
Can I flash over the 4.21 version I have? I can't remember where I got this non asian RSU4.21 from.