Abstract: Some embodiments related to a method for a host device to obtain cellular network connectivity which includes performing a first process at a first time, the first process comprising using non-cellular data connectivity to download a profile data structure, the profile data structure comprising a set of two or more International Mobile Subscriber Identities, IMSIs, and authentication data; and performing a second process at a second time, the second time being after the first time, the second process comprising selecting an IMSI from the set of IMSIs; and attempting to register with a cellular network using the selected IMSI and the authentication data to obtain cellular network connectivity.

Abstract: Methods for operating a communications-enabled application, controlling a secure profile via an operating system, and operating a cellular network are provided. Operating a communications-enable application includes detecting a need for data transmission when the mobile device has a communications status which is incompatible with the need and sending a request to activate a secure profile. Controlling the secure profile includes receiving a request from an application to have data session access via a secure profile and activating a data session utilising a secure profile. Operating the cellular network includes receiving a request to establish a cellular network data communications session from a mobile device including the communications-enabled application and establishing a data session with the mobile device using the secure profile. A mobile device and cellular network for performing the methods are also provided.