I notice my Note 3 has no service in my local Target store. As soon as I step outside I have 4G. I was in a Target last week in Ames Iowa and I had 4G throughout the entire store and was able to text from within the store. I am unable to explain this. My phones Network mode is set to CDMA/LTE/EVDO. Roaming access is off. Any thoughts would be appreciated since there are many other examples in the Chicago area where this is an issue