I just got off the phone with T-Mobile and found that they are offering (today only) $.99 micro sim cards to activate on their T-Mobile service. I plan on testing our iPhone 4S phones around town (the wife is a flight attendant) and around the country to verify adequate coverage before buying new 5S iPhones and porting our VW numbers over to T-Mobile.
I hope this will help others in a similar situation.
I hope this will help others in a similar situation.