I have a Sendo SV663 phone that came with the simcard. now, my friend gave me his old Motarola C975, which is for the network "3 mobile". Now, my Sendo SV663 phone's simcard is for the network "Vodaphone". Now, when I put my Vodaphone sim card into the Motarola C975, it said "Enter Subsidy password". What does this mean? Will the Simcard work with the 3 network?