Compared with the dual SIM dual standby product, the dual SIM dual active product has an advantage in services and user experience, but has a disadvantage in product costs. As shown in FIG. 1, FIG. 1 is a structural diagram of a dual SIM dual active system. FIG. 1 may include: a SIM 1, a SIM 2, a MODEM 1, a MODEM 2, a radio frequency integrated circuit RFIC 1, an RFIC 2, a radio frequency front end 1, and a radio frequency front end 2. The radio frequency front end 1 includes devices such as a filter and a power amplifier. The radio frequency front end 2 includes devices such as a filter and a power amplifier. As shown in FIG. 2, FIG. 2 is structural diagram of a dual SIM dual standby system. FIG. 2 may include: a SIM 1, a SIM 2, a MODEM 1, a MODEM 2, an arbitration apparatus, an RFIC, and a radio frequency front end. The radio frequency front end includes devices such as a filter and a power amplifier. It can be learned from the structural diagram of the dual SIM dual active system shown in FIG. 1 and the structural diagram of the dual SIM dual standby system shown in FIG. 2 that, the dual SIM dual active system requires two basically same RFICs, radio frequency front ends, and antennas to ensure that the radio frequency front ends for the services on the two SIMs do not conflict with each other. Therefore, compared with the dual SIM dual standby system, the dual SIM dual active system requires more radio frequency devices. In addition, a larger circuit board area needs to be occupied, posing a challenge to a structural design of a terminal product. In view of these factors, the dual SIM dual standby product has an advantage in costs.