Traditionally, global node mobility problem is addressed at networking layer (e.g. Mobile IP and related solutions). However, none of these classes of solution is designed for supporting seamless handover switch between different network providers and technologies, where the node accesses the network from another point of access (with new access procedure) and can change technology access. Starting from the observation that seamless mobility is requested by the applications, we tackle the problem at higher layer. The proposed solution, called WiSwitch, provides always-on, continuous and optimised network services, whenever possible, to the applications independently from lower layers.