Also, another thing I've been playing with is Grooveip used with google voice, which allows you to make your calls through your data plan, which in turn does not use your t-mobile minutes. It is not perfect, you have to play with the settings quite a bit to get it right, some people hear echos... But Grooveip only costs $5, and any time you are in a 4g area or wifi, it works great. I will be using this to make calls, but still probably receive calls on my t-mobile plan. But with the 2 apps, you pretty much get unlimited minutes since you're getting 5gb of data.