My Galaxy s5 will not send or receive any kind of picture, video, or group message and has been acting up for over a week. The message that pops up when I try to send a picture message is "Service Not Activated on Network" which I do not understand because my service plan allows picture messages and my mobile data is on... I have tried many things (restarting my phone, changing messaging platforms, turning on/off wifi, taking out the battery and sim card) but nothing at all has worked. I look forward to some sort of assistance because my 2 month old phone should not being acting so poorly!!