Service processing method and system

A service processing system, comprising:

• a first controlling circuitry configured to:
• in response to a detection that a first subscriber identity card in a multi-card mobile terminal is performing call service, control other subscriber identity card in the multi-card mobile terminal to register with a service network based on a data channel which is set up by the first subscriber identity card and used by the first subscriber identity card to perform the call service, wherein the first subscriber identity card is any one of subscriber identity cards in the multi-card mobile terminal;
• and
• a service processing circuitry configured to:
• during the call service of the first subscriber identity card, in response to a call service request is received from the other subscriber identity card in the multi-card mobile terminal, provide call service to the other subscriber identity card which transmits the call service request using a data transmission channel set up by the first subscriber identity card, wherein the data transmission channel comprises the data channel set up by the first subscriber identity card and a wireless connection.