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Lowest plan is $ 25 with unlimited everything (3GB high speed data). Only $ 20 with auto pay

As a bonus, add a second device for an EXTRA $ 60 off. No plan required on this one. Second device must be over $ 60 so the Sky Pro or the iPhone SE are options.

So you get a Luna Pro, a Sky Pro and $ 25 airtime for $ 75.
Or a Luna Pro, an SE and $ 25 airtime for $ 104

Limit is 4 sets in any combination. I believe.