As of September 1st, Iridium has a brand-new postpaid satellite airtime plan. They've reformulated their standard basic plan to include 10 minutes of satellite airtime and 10 SMS per month.
Why is this a big deal? It means that Iridium users with phones like Iridium Extreme and Iridium 9555 now have a better option for emergency or extremely low-use airtime, with the convenience of 10 minutes built-in to the plan per month (and at no extra cost over what the airtime cost before).
Postpaid airtime is when you sign up for a flat monthly fee in a yearly contract. Sometimes carriers will call this a subscription. Sometimes it's called "pay as you go." Postpaid plans have a 12 month commitment.
(For a more comprehensive look at the differences between prepaid and postpaid airtime, take a look at this blog post).
There are some definite advantages to postpaid satellite airtime over prepaid satellite airtime. Notably:
Iridium's postpaid basic plan works with the following satellite phones and terminals:
Iridium Extreme
RedPort Aurora
Iridium 9555
Iridium 9505a, 9505, and 9500
BEAM RST100
SC4000