I was wondering if USCellular has or enforces a 50% rule on their National plans. What are the primary roaming carriers and do they even have a 50% roaming rule? For example: some snowbirds from Iowa travel to their winter home in Mesa, AZ Nov-April, where they would use a National plan but not be using the home, native network for 5-6 months. And for a month during the summer again be in AZ. Two USCellular representatives said USCellular prefers to keep users in the native network, yet will not cancel the service if the usage is 'out of area' for extended periods. Any information is appreciated. Thanks!