kind of dongle, credits or internet connection.
Known limitations:Some models like 5800, N85,
N96 require SX4 authorization to write PM fields
120 and 308(this fields store SP Lock status and
SP-Network codes).It is possible to receive some
errors at the end of unlock process on this new
models,when software try to write recalculated
(unlocked) PM fields 120 and 308.In 1-2 days
an update will be ready who will solve this
problem on such new phones too.