Im having the same problem with my z998 my friends have gotten my texts but i cant get theirs. I've turned my phone on and off so many times but it still wont work. I've even tried texting myself and didn't get it. Did you ever solve the issue? If so let me know what the problem was. Thanks!

Hmm.. That's odd. Are you sure you are not receiving? Try asking a friend beside you to send you a message just to confirm that. Also ask someone near you to call your phone.