MX-Key Credits works in this way:

1. MXKEY wich have less then 99 credits, 1 (one) credit will be decreased for each operation that are respectively assigned for.
2. MXKEY who have 100 credits or more, credits will not be decreased for operation that are respectively assigned for.

here is the consumption for dct4 credits:
- mxkey serial have 99 credits or less, will have 1 credits for each operation assigned for dct4 credits
- mxkey serial have 100 credits or more, all operations assigned for dct4 credits are UNLIMITED

here is the consumption for bb5 credits:
- mxkey serial have 99 credits or less, will have 1 credits for each operation assigned for bb5 credits
- mxkey serial have 100 credits or more, all operations assigned for bb5 credits are UNLIMITED

Credits for MXKEY BLADE-X server system (dct4 and bb5):

1. DCT4 credits used for DCT4PLUS SIMRPL (also known as DCT4PLUS unlock RSA) and soon
2. BB5 credits used for BlackBerry MEP calc, BB5 SD repair, BB5 SD AUTH, BB5 SIM RPL, BB5 NCK CALC and soon