Wanna try to get online using IrDA port on Dell Axim X3-300 and Siemens S45 with IM-3 GPRS ?
This is the configuration setting that I’ve used.

1. Create new modem connection on My ISP section. I use this section to avoid the cofiguration conflict between ActiveSync connection and Internet -GPRS- connection.
2. Select modem using Generic IrDA.
3. Dialed number is: 99***1#
4. User name: gprs
5. Password: im3
6. Click Advanced button, and select 57600 for Baud rate or you can try to select default value 19200.
Uncheck wait for dial tone before dialing option. On extra dial-string modem commands, insert this command:
+cgdcont=1,"IP","www.indosat-m3.net"
7. Finish and try to online………