Optionally, in some embodiments of this application, that the arbitration apparatus performs one of the following operations may further include: when the determining result is that the third frequency band conflicts with the second frequency band, the arbitration apparatus maintains the first operating mode. For example, when the third frequency band conflicts with the second frequency band, the arbitration apparatus may maintain the dual SIM dual standby mode. In this embodiment of this application, the arbitration apparatus determines that the third frequency band conflicts with the second frequency band. To ensure that a high-priority service can be performed, the arbitration apparatus initiates a preemption request based on priorities of the first communication service and the second communication service, to ensure proper running of one communication service and improve service resource utilization.

Optionally, in some embodiments of this application, the determining whether the third frequency band conflicts with the second frequency band may include: determining whether the third frequency band conflicts with the second frequency band according to a preset correspondence table, where the correspondence table is used to indicate a frequency band conflict status between the MODEM 1 and the MODEM 2. In this embodiment of this application, a specific implementation in which the arbitration apparatus determines whether the third frequency band conflicts with the second frequency band is provided, thereby improving feasibility of the solution.