So if you had the badluck to have one of these phones in your hands, you have 2 choices....
1.- Go to your Provider and request a dupe simcard with latest 64Kb and voltage technologies which exclusive supports R2J005
2.- Upgrade or Downgrade your phone only to R2F015 firmware... and your old simcard will work ok with your new phone and this firmware.
cruiser don´t have this flash in suporte
R2F015