NOS Telefone

ZON launched the service NOS Telefone in December 2011, supported by OptiMobile’s solution
for voice calls over WiFi. The service is marketed by NOS under the slogan “Take your landline
anywhere in the world” and offers subscribers the possibility to use their home (fixed network)
subscription to make calls via WiFi using a smartphone or a tablet. The service can be used from
anywhere in the world.

The “NOS Telefone” service has become very popular among an increasingly larger group of NOS
subscribers.