DUAL-SIM CARD DUAL-CALL CONNECTION COMMUNICATION METHOD, TERMINAL, NETWORK AND SYSTEM

摘要

Embodiments of the present invention disclose a dual-card dual-active communication method, a terminal, and a system. The method is applied to a terminal that supports dual card dual active. The terminal includes a radio frequency circuit, and a first modem and a second modem that are separately coupled to the radio frequency circuit. The first modem includes a first IP multimedia subsystem IMS module, and the second modem includes a second IMS module. The method includes: sending, by the first IMS module, a first access request to a first gateway on a network side via the first modem and the radio frequency circuit, to request to access a first IMS network on the network side; and when the first IMS module stably camps on the first IMS network via the first gateway, sending, by the second IMS module, a second access request to a second gateway on the network side via the first modem and the radio frequency circuit, to request to access a second IMS network on the network side.