Patent ID: 9596591
Date: 2017-03-14
CPC Classifications: H04W

Claim:
1. A method of switching active subscriber identity of a communication terminal, wherein the communication terminal is capable at each moment in time of having only one active subscriber identity, the method comprising: maintaining, while a first subscriber identity is active and registered, a first periodic timer associated with the first subscriber identity; initiating an active subscriber identity switch from the first subscriber identity to a second subscriber identity and maintaining the first subscriber identity as registered; stopping the first periodic timer in response to the initiation of the active subscriber identity switch; storing a timer value based on a time when the first periodic timer is stopped; de-activating the first subscriber identity; activating the second subscriber identity; initiating an active subscriber identity switch from the second subscriber identity to the first subscriber identity; de-activating the second subscriber identity; and activating the first subscriber identity, wherein the step of activating the first subscriber identity comprises: