SMS delivery Confrimation - Sprint

[Gone Soaring]

I recently changed to an 8830 with Sprint from T-mo. I get the "D's" with PIN messages, but don't with SMS messages. I had been getting them with T-mo. Any Ideas?

[d_fisher]

Go to Options > SMS and change the options.

[Gone Soaring]

Thanks Doug. I have tried, however when I tried, I get a message "Invalid Service Center specified". I have nothing in the Service Center. Do you have an idea what should be entered in the Service Center line?