I live in an area where my Galaxy Nexus and my iPhones have gotten 4g from VZW at my house, at work, and at the food store. On my LG G2 I only get a 3G connection at these places and it has never switched to 4G. I got my device activated in-store by the people who worked there and this doesn't seem right. Is there anything I can do to manually activate 4G without going back to the store?