Hi. I was recently given a Samsung Galaxy S2 Skyrocket and have it activated and MOSTLY working on Straight talk. I can got on the internet, send/receive text messages, The 4G Symbol shows and my speeds indicate that it's working great. The only problem I'm having is that I can only send MMS messages, but I can't receive them. All I get is a message with a "Download" button. When I touch it, it tries to download, I can see the 4G icon indicating that it's trying to retrieve it, and then is always says that the download from whoever it is that sent it failed. I'm having difficulty finding a fix for this. Anything is appreciated! Thanks in advance for your help!