Go to Menu>>Settings>>System Updates >>Update Profile
Also check Menu>>Settings>>WirelessNetworks>>Mobile Network does it show connected
Also go to Sprint Zone>>I need Help - Do voice and data show green
One last thing would be to open your browser Menu>>More >>Settings>> Clear Cache Clear Cookies Clear History and pull the battery and let the device reboot.
These are basic data troubleshooting steps - Hope this helps
it wont send any pictures it just keeps loading like if its trying to send but nothing anyone have this problem