fix sprint error msg 1051 Most customers block these functions due to the fact that some short codes charge a fee when used, this can be blocked on your own. If you would like to unblock this feature you can simply log into your sprint.com account.

My Preferences -> Limits and Permissions -> Block texts

If the number is blocked it will appear and you will be able to click on the number a drop down menu will appear and you will be able to click unblock.