I have noticed a problem with my sprint g2. I am having problems keeping my LTE signal. Places where I could get LTE signals with my old original galaxy nexus I am only getting 3g with this phone. If I ever switched to 3g on my nexus I would restart the phone and usually for several days it would stay LTE. With the g2 I restart and keep LTE for a few seconds before it switches to 3g all while not being moved. I saw on a couple sites that the Sim card was incorrect and needed to be changed. How do I find out if my Sim card is the correct one? Any other fixes I should look at?