So I was trying to find out the reason why I can't send pictures through my BB although I do have a data plan and I came across four names (all the same) but will different numbers following them in the Host Routing Table.
When you select Register Now, it doesn't matter what entry is under your cursor. The entire Table is registered. I have more Verizon entries than I care to take time to count.
I have Verizon [240], Verizon [71440], Verizon [55c40], ... and the list goes on longer than I care to count. That's all I have in my HRT. Verizon is the only word. Your HRT with Sprint will be different. I suggest you contact Sprint Customer service to make sure you have MMS capability on your phone. That isn't necessarily the same as having a data plan. My Verizon 8830 had data, but no MMS capability.