Just as a heads up, disabling data on the phone itself will also disable your ability to send and receive MMS messages. SMS will still send fine however. That's how its always been for me unless things have changed. Someone else feel free to chime in on this.
Sent from my Captivate
Samsung Galaxy S3 SGH-i747
Task650 AOKP Build 7/20/2013b
Samsung Captivate SGH-i897 Build #1012
AOKP Milestone 6
Reading XDA makes me want to slam my head against a wall after just 5 minutes.