Systems and methods are provided for enabling dual subscriber identity module (SIM) card usage for accessing packet switched services/networks. Each of the dual SIM cards operate in an always on mode and can be used to establish and maintain data connections over which the packet switched services/networks can be engaged. The dual SIM cards can be used in the aggregate or separately according to dynamic selection or fixed/mapped associations between an application requesting to access the packet switched services/networks and one or more of the dual SIM cards.