Modem and method of operating a wireless device

A method of operating a wireless device that is capable of providing service for at least two Subscriber Identity Modules (SIMs), the wireless device comprising a modem which comprises a plurality of sets of modem components including at least a first set of modem components and a second set of modem components, the method comprising:

• selectively reconfiguring data and/or control flow between the at least two SIMS and the plurality of sets of modem components such that,
• in a first configuration, the first set of modem components provides wireless connection service for a first SIM of the wireless device and the second set of modem components provides wireless connection service for a second SIM of the wireless device thereby allowing active wireless connections to be made on behalf of both the first and second SIMs simultaneously by the first and second sets of modem components, and,
• in a second configuration, both the first set of modem components and the second set of modem components simultaneously provide an active wireless connection service for the first SIM.