Keeping customers connected at home and abroad

What is roaming?

In wireless telecommunications, roaming helps to make sure that a travelling wireless device, typically a mobile phone, is kept connected to a network, without breaking the connection.

For example, if you travel beyond your mobile phone company’s transmitter range, your mobile will automatically “hop on to” another phone company’s service, where it is available.

Who is roaming valuable for?

  • Operators; and
  • Consumers.

What are the benefits of roaming?

  • Sustain seamless user experience in both home and visit network;
  • Use data to access internet;
  • Make and receive voice calls;
  • Send and receive messaging; and
  • Access other services (e.g. home data services) while travelling outside the geographical coverage area of the home network.

What is the GSMA doing to help in relation to roaming?

The GSMA defines roaming architecture and specification, making roaming work smoothly for all telecom services, including data, voice and messaging.

Discover more about roaming

For further information, insight and industry expertise on Advanced Communications, head to the GSMA’s All-IP Business Guide where you’ll find further resources to support you.


“With the GSMA’s support, a VoLTE roaming architecture was scoped and commercially delivered within seven months, allowing our organisation one step closer to migrating towards a 4G network.” Hiroshi Ishikawa, SVP Managing Director of Core Network Development Department NTT DoCoMo