Didn't work.
The ##DATA only told me my data usage total along with the number of txt and picture messages. ##786 gave me a message saying the number was incorrect or no longer in service. For kicks, I deactivated my phone (by activating another) and reactivated my phone and reprogrammed it. Still no data.
I went through a few forums looking at a few different ## codes and the only one that worked for my phone was ##778.