[paolo]

just because it has a slot in the back that looks like it will accept a SIM, it does not indicate what kind of phone or technology it is. Some Bellus phones are based on a technology called CDMA (Carriers that Depends Mostly on Analogue) and the disabled RUIM slot on the back was never enabled in north american models but was there because of cost savings to manufacturers.

Any NEW Bellus phone uses UMTS, a Third Generation RAN that uses SIM cards, or ICCID cards. Take out the SIM from your Bellus phone and place a call to any non-emergency number, if it works, the phone is most likely CDMA and there is no such thing as unlocking for it.