So my mom's Galaxy Attain keeps losing its 4G signal. Its been going on for a few month (since I bought it). It has 4G for a good while, but then it goes away. It doesn't go to 3G, since we get not 3G service in my neighborhood, and doesn't even go to 1x. It stays signal-less. I either have to switch airplane mode on and off so it can come back. Other times, my mom has to restart the whole phone over. Meanwhile, my LG Esteem (with Metro also) has 4G all of the time, and we live in the same apt. So I don't get it ?