Finally, someone figured out how to lock the Captivate to 2G or 3G. Now we can turn of 3G during non-data usage to converve battery life. From another forum: Originally Posted by BecomingxInsane I found out that if you go into the dialer and type in *#*#197328640#*#* that it will take you into a menu that will allow you to change it. From the main menu of the ServiceMode screen, select DEBUG SCREEN, then PHONE CONTROL at the bottom, then UE STATE CONTROL. From there select CHANGE RAT TO WCDMA to enable 3G only, and select CHANGE RAT TO GSM for 2G only.