Only problem (not specific to the Kyoceras) is Virgin Mobile/Boost devices, which are not allowed on RingPlus but work as long as nobody at RingPlus notices, can't use mobile data on RingPlus. I'll never be able to hack it on the vMo dumbphone I have on RingPlus but I get the feeling I might pull it off on an Android, especially these Kyoceras.
Also, something I really like about Kyocera: MSL is ridiculously easy to get, just use Kyocera MSL reader app:
https://play.google.com/store/apps/d...unlockgods.kyc