I've had an ongoing issue with my Bionic for some time now. I live east of Nashville, TN. If I have the 4G enabled, it will get service, and then the icon will turn white and have no connectivity. It'll go back and forth at random with being connected and not being connected. If I turn it off and use the 3G, the problem stops, for the most part. Ironically, when I traveled to the Washington, DC area last month, I had no problems at all with 4G. The minute I came back into Tennessee, it started again. Is this a known issue, or does "the network" not enter the state of Tennessee? 