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1. (WO2017019699) REDUCING CALL FAILURE RATE IN MULTI-SUBSCRIBER IDENTITY MODULE CAPABLE DEVICES

Pub. No.:    WO/2017/019699    International Application No.:    PCT/US2016/044083
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Wed Jul 27 01:59:59 CEST 2016
IPC: H04W 76/02
H04W 4/22
H04W 8/18
H04W 48/18
H04W 60/00
H04W 76/00
Applicants: QUALCOMM INCORPORATED
Inventors: BODDURU, Appala Naga Raju
UPADHYAY, Onkar Nath
JAYAVARAPU, Venkata Krishna Murthy
Title: REDUCING CALL FAILURE RATE IN MULTI-SUBSCRIBER IDENTITY MODULE CAPABLE DEVICES
Abstract:
A method for reducing call failure rates on a multi-subscriber identity module (SIM) mobile communication device includes: selecting a first SIM camped on a visiting public land mobile network (VPLMN); attempting call initiation on the first SIM; determining whether call setup on the first SIM on the VPLMN is successful; in response to determining that the call setup on the first SIM is unsuccessful, determining if a second SIM is camped on a home public land mobile network (HPLMN); and in response to determining that the second SIM is camped on the HPLMN, selecting the second SIM camped on the HPLMN; and attempting call initiation using the second SIM.