 Do you ever raise your arm to the sky in an effort to get cell phone service? Does putting our arms up actually help us get bars? You might think putting your arm up will get your phone close to the cell tower or improve your chances of picking up a signal. In reality, cell signals are more or less homogeneous and surround us. If you don't have a signal now, the length of your arm won't be enough to get it. I talked to Lin Zhang, a professor in the Department of Electrical and Computer Engineering at Rice University, about this behavior. I think in general it's insane. Yeah? In general, the general answer is insane. It doesn't help that much. You may think that the cell phone signal is like a spotlight when you're on stage. It's not. It's already become a fuse. Therefore, when you raise your hand or change your orientation, the effect is very small. In general, I don't think it helps a lot. With that said, walking a half block or so can help, especially if you're in a city. Because if you're in a city, you're receiving signals as they bounce off buildings, so walking around a bit could change how the signal gets to you. As for the actual phones themselves, there isn't much you can do to change the service you get. The manufacturers already do rigorous testing around cell signal, and barring fluke situations like Antenna Gate with the iPhone 4, they do a good job of maintaining calls. Of course, the service provider you have can also affect your service, because not all providers are created equal. But if you're in a dire situation and you need a cell phone service, Lin recommends getting on your feet and walking. Look at your situation. If you don't have good call quality, it's because a lot of people are nearby you, like the crowded concert. Walking a few meters wouldn't solve the problem. But if you happen to be in an urban canyon, like in downtown area with other buildings, could potentially obstruct signals. Or you're indoor, that there's some location that you don't have good reception, maybe walk a little bit. The more you walk, maybe the better chance you have a solution. You heard the man. Get out there. Maybe you'll wander into service.