[MacsHeadroom]

Your bill won't go down much?

5GB of 4g internet with 3g speeds after that, unlimited texting, and 100 minutes of non-wifi talk (unlimited on wifi) per month is only $30 flat on T-Mobile if you buy the start-up kit at Walmart.

If you need more minutes than that you can either call over wifi, pay $0.10/minute or talk all you want for free over Wifi/3g/4g using a VoIP app like GrooveIP.

[michaelgold]

I don't think the iPhone 5s has wifi calling.

Is this accurate? http://support.t-mobile.com/thread/52768?start=0&tstart=0

[bshep]

Although Facetime Voicecalls are not the same thing, its similar and works with any iOS 7

[ewang1]

Not really... FaceTime only lets you do iOS to iOS. Wifi calling lets you call any phone number.