Recently, over the last couple of weeks, my Droid Razr randomly falls in and out of its network. One minute I'll see a blue 4G icon at the top of my screen, then nothing. Usually I'll just pop into airplane mode, and then back to 4G, and it'll come back. But, it's getting fairly annoying. I don't know exactly why it's doing this, and would love some feedback from you guys. Ideas?