The invention discloses a multi-SIM card multi-operator network
fusion system, comprising a device terminal with an external SIM card and a built-in SIM card, wherein the multi-SIM card multi-operatornetwork
fusion system further comprises a background
system wirelessly connected with the device terminal. The invention further discloses an SIM card switching method of the multi-SIM card multi-operator network
fusion system. The method comprises the steps of: S1,
database update: updating network
signal parameters and limited switching strategies of operators covered by each region in a
database. The invention further discloses a recharge billing method of the multi-SIM card multi-operator network fusion
system, comprising the steps of : (1) establishing a binding relationship among the built-in SIM card, the external SIM card and the device terminal. According to the multi-SIM card multi-operator network fusion
system disclosed by the invention, the network disconnection rate of a vehicle owner in use due to the insufficient coverage of an operator
base station network is effectively reduced by using a
dual SIM card switching mechanism, and the success rate of the operation of Internet of Vehicles service is improved.