Here are the settings, taken from one of the sticky Cell C threads in this forum. A lot of the information is not needed for your purposes as things like DNS, IP address, port, should all install automatically via the SIM. You may also find the APN installs automatically though if you are really stuck you can choose Advanced in the Cell C software and enter manual settings. The USSD code at the end is useful for checking your data balance in realtime if you are not using the Cell C software which will do it for you; you can enter it in gingg's excellent freebie download dashboard MDMA and it works a treat. Good luck!
CELL C CONNECTION DETAILS:
Profile name: Smartdata GPRS/EDGE
Homepage:
http://www.cellc.co.za/wap
I.P. Address: 196.31.116.250
Port: 8080
APN: internet
Connection Type: Non-Secure
Username: Leave Blank
Password: Leave Blank
Extra initialization string for cell as modem or data card in windows: at+cgdcont=1,"IP","internet"
Dial Up Number: *99#
Username: Leave Blank
Password: Leave Blank
Cell C Primary DNS Server: 41.157.9.4
Secondary DNS Server: 41.157.9.5
Cell C SMTP: mail.cmobile.co.za
USSD Code for checking data balance: *101#