Hi I live in conyers, ga 30012 and recently purchased the S-5 I've been having issues maintaining 4g Lte coverage when I should because my 2nd phone (iPhone5c) is always 4g Lte covered. I have took it to the local store and they have changed the sim card but im still having the same issues.. When I check the coverage area it says I should be covered. Im constantly on 3g when im in a 4g area. Is there any explanation ?