So I switched to T-Mobile from Sprint and love how fast T-Mobile is. The only bummer is that there are a few places I go that T-Mobile doesn't have great coverage. I don't go there too often, but my job takes me here and there. So, I bought a Magic-Sim dual sim adapter for my iPhone 5 and use a pre-paid AT&T Go Phone $2 a day unlimited plan and I can switch carriers whenever I need to. On long car trips sometimes we'll need to switch if T-Mobile doesn't roam well there. So the question for my wife and I was pretty simple. Switch to T-Mobile and Spend $75 a month after employee discount or stay with Sprint, AT&T or Verizon and pay at least $140 for the family plan. That's a savings of $780 a year. So...for $780 a year, would you deal with a bit of inconvenience to switch sims for the few times you need to?