I had this setup with my razr and axim for a while. Heres the settings I used on the axim:
Connection Name: whatever you want i named mine wap.cingular
Modem: bluetooth dialup modem
Phone number: *99***1# (turn dialing rules off)
Username:
WAP@CINGULARGPRS.COM (case sensitive)
Password: CINGULAR1 (case sensitive)
**click advanced tab**
Baud rate: whatever i use 19200
uncheck wait for dial tone before dialing
Extra dial string: +CGDCONT=1,"ip","WAP.CINGULAR" (case sensitive and that is an O not a zero)
All other settings leave default (port settings, TCP/IP, Servers)
Make sure you turn bluetooth on the razr, set it to discoverable, and then take your pda and pair to the razr. You'll have to just double-tap the bluetooth connection on the pda each time you'd like to turn on the connection. Hope this helps. Let me know if you have any questions.