The invention relates to a technique for managing an activation state of a module for radio access to a main network of a user device (30, 31). The device also includes a module for wireless access to a secondary network, which is activated. The user device looks for a beacon signal of the secondary network when the module for wireless access to the main network is deactivated. The user device detects a beacon signal of the secondary network broadcast by a transmitter device (21) associated with an access point (20) of the main network and, following said detection, activates the module for wireless access to the main network. The user device then connects to the main network via the access point. In a specific embodiment, following the detection of the beacon signal, the user device receives information broadcast on the beacon signal and obtains an identifier of the access point from said broadcast information.