i can only receive picture mail from verizon customers. why is this? and how can i fix it so that i can get it from everyone? there's not even a notice when my friends try to send me pictures that i don't receive. my friend, he has sprint, didn't work. my other friend, she has at&t and it doesnt work... and the other... i dont know what service, but she tried to send me 6 pictures, 4 times each! and i never got them. so she sent them to my mom who has verizon and i sent them to myself. this proves its not sender error.