Previous thread was marked as expired.
Lowest plan is $25 with unlimited everything (3GB high speed data, then 2G). 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.
*These devices are locked to work on Simple Mobile service plans only. They may only be unlocked after one year of service and will not work on any other network/provider until unlocked (such as Verizon, T-Mobile, AT&T. Sprint, Cricket and so on). There are no unlock codes or workarounds available on the market for these devices (i.e. eBay unlockers, R-SIM, etc.)
ONE LAST NOTE... seems that Simple Mobile iPhones can be unlocked with R-SIM. YMMV until it's official.