Patent ID: 8626233

Claim:
A method for configuring a mobile device capable of supporting multiple number assignment modules comprising: writing a first configuration parameter to indicate whether the mobile device should support multiple number assignment modules located on said mobile device, each number assignment module providing registration, with a network, of a separate telephone number for billing of wireless voice services, the mobile device is a dual mode device and capable of supporting both wireless voice services in a wireless voice communication mode and wireless data services in a wireless data communication mode; providing a non-volatile memory having a single storage space to store data credentials for the wireless data service in the wireless data communication mode, the credentials associated with a first of said number assignment modules, wherein billing of the wireless data services from said mobile device is associated with said stored data credentials; specifying a second configuration parameter to indicate whether the mobile device should support wireless data service connectivity on a second or subsequent of said number assignment modules; and setting a third configuration parameter to indicate whether separate billing should occur for wireless data service usage on the second or subsequent of the multiple number assignment modules checking, subsequent to transitioning to a second of said number assignment modules, whether the second number assignment module supports wireless data service connectivity; responsive to the checking, determining whether separate billing is required for wireless data services oil the second number assignment module; and responsive to the determining, establishing a wireless data connection using data credentials of said second number assignment module.