For newcomers to the mobile internet market, the hotspot function is a way to quickly get coverage in areas without having to build large-scale infrastructure. For example, Ziggo plans to use its internet modems with WiFi nationwide as hotspots that allow other users to surf outside the home on their neighbours' network. Each model shares a small piece of bandwidth (a shielded and secured piece) with the public, in this case the other Ziggo customers. Ziggo suddenly gets a mobile internet infrastructure. It also saves on energy costs and the construction of new masts that often lead to social protest.
T-Mobile used a similar approach in femtocells: small mobile transmission masts sweden telegram data ('modems') in every customer's home. This means a completely different approach to building a mobile network. All small transmitters that pass a piece to each other instead of a network with large transmission masts or hotspots that process many users at the same time and need many masts to provide coverage. In the meantime, KPN and Vodafone have also indicated that they are studying the use of femtocells and are seriously considering them.