Tmo family plan with 2 unlocked phones VS. Tmo family with 2 subsidized phones
For people interested in the tmo family plans, here is some math.
Getting 2 subsidized phones over a two-year period breaks down to an extra $15 a month ([$180 x2]/24). 2 unlocked phones is $44 a month ([$530 x2]/24).
Looking at text and web family plans with no annual contracts, its $109.99 for 750mins, $119.99 for 1500mins and $139.99 for unlimited. This gives you freedom of picking your plans or switching to another carrier that supports this phone.
Knowing that if you get the subsidized version, you will be paying $160 a month plus the breakdown of $15 a month (spreading out what you pay up front for the devices) it comes to $175 a month.
With the unlocked device price breakdown at $44 a month, you can see you will save money if you buy the unlocked phone and use either the 750min or 1500min family plans as they will cost you $154 and $164 respectively.
This is a two year savings of $504 and $264!