The ability to use a mobile phone overseas. Tri-band and Quad-band phones allow roaming through the USA. GSM and GPRS phones will provide roaming throughout most of the international community. CDMA phones do not (practically) offer international roaming. Roaming charges are substantial.

GPRS stands for General Packet Radio Service, this standard allows packet rather than circuit switch connections on cellular networks. This allows high-speed mobile access and the ability to connect to the mobile network when Internet access is required.

GPS is short for Global Positioning System, GPS refers to satellite-based radio positioning systems that provide 24 hour three-dimensional position, velocity and time information to suitably equipped users anywhere on or near the surface of the Earth (and sometimes off the earth). GPS technology is used in a wide range of applications, including maritime, environmental, navigational, tracking and monitoring.

Goods and Services Tax (GST) is a federal Government initiative and is a 10% tax on most goods and services supplied. Every business that supplies goods and services collects GST for the Australian Tax Office. This means that the price of their goods and services include a GST amount.