Saw this FreedomPop phone on Bestbuy. Says it's Freedompop in the title, but says "internal carrier - not applicable". Says it has cdma as well as gsm, so can it be used on any carrier, including non-Freedompop?
Maybe it's Sprint CDMA with 3g gsm capabilities? And maybe the gsm part isn't compatible with u.s carriers? Dunno.
https://www.prepaidphonenews.com/2018/04/you-now-need-180-days-of-service-to-get.html
Looks like 180 days of service is the new norm to unlock prepaid phones.