公开(公告)号：US11589280B2

公开(公告)日：2023-02-21

申请号：US16976679

申请日：2018-03-27

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Zhenrong Wei ,  Hao Song ,  Shujun Dang ,  Caihua Huang

IPC: H04W36/14 ,  H04W8/18 ,  H04W88/06

Abstract: This application provides a method for returning from a low-standard network to a high-standard network, to resolve a problem that a primary card of a terminal device in dual SIM dual standby single pass mode cannot return to the high-standard network after falling back from the high-standard network to the low-standard network during a data service. The method includes: detecting that a first subscriber identification module SIM card of the terminal device falls back from a first-standard network to a second-standard network; obtaining a registration status of a second SIM card, where the registration status includes an operator of the second SIM card and a network on which the second SIM card camps, and the first SIM card and the second SIM card enable the terminal device to work in the dual SIM dual standby single pass mode; obtaining a target standard network based on the registration status of the second SIM card; and registering the first SIM card with the target standard network.