I have had my phone about 3 months. I was able to recieve videos by text but now for some reason the video won't open. I have the sound in the video but the video itself won't open. it starts to open and then I get the greyblue screen with a little white box in the top section. I went to the ATT store and they sent me a video from a phone they had and it worked fine but when I recieve one from someone else it won't open,,,,anyone have any ideas?