This past week while I was in Prescott, AZ my radio started doing a weird power down/power up thing. It would power down for about 10 seconds then power up and work for another 10 - 15 seconds, then repeat several times before working fine until the next day. It had worked fine most of the day but started doing this when I came out of a movie theater. I thought it might be the Car adapter or power adapter. Well, now that I'm back in California I put the MyFi in the mount installed in my Jetta with power hardwired, and the same thing happens where it didn't before. It works fine after a few of these cycles. Maybe it has to warm up from generated heat? Anyone have a similar problem?