I updated my phone on 1/19/14 when prompted and everything seemed fine until today when I discovered I can't send or receive picture messages. When attempting to send, my text app (I use the default app) acts like it's sending the message but it never shows up in the conversation and the person I'm sending it to never receives it. When they send me a picture, I get a download failure notification and eventually have to reject the download. I've tried restarting my phone multiple times as well as holding the power key and volume down key (which I was told to use for a previous problem months ago which worked), and deleted some messages and killed all other running apps but nothing is working.