Global System Mobile is an open standard system, developed under the auspices of international telecommunications standards bodies.

Today, GSM is established in over 100 countries worldwide, and growing. New GSM networks are being established every month.
GSM features are being widely implemented by operators, and enable them to offer highly differentiated services in what is an increasingly competitive environment.
Computer and software vendors are also welcoming GSM data capabilities looking to provide mobile connectivity to their customers.
GSM can also provide an alternative to fixed line public telephony through wireless local loop (WLL) services.
GSM is the only international standard mobile phone system which is being seriously developed at this level.
Developers of other mobile standards may share the same vision, but none can claim the same level of global availability and high speed data Specification that GSM has today.
GSM systems were designed from the beginning with a digital future in mind. Operators will only need to carry out an upgrade in order to bring exciting new services on stream.
It works through the SIM (subscriber identification module) card which all GSM phones use. The SIM card was designed for GSM as a security measure, and is based on smart card technology with a programmable micro-chip. GSM is the only digital mobile system with such a capability. No other mobile technology uses the SIM card concept.

"I can go anywhere"
People want to take their phone with them when they travel. And they want all the facilities which they have at home to follow them. With GSM, they can travel from one side of the world to the other and not lose a single call or message or file transfer.
One of its most outstanding features is its ability to let subscribers take their entire set of services with them, wherever they go - the roaming capability.

Global System Mobile dedicated coverage solutions a new technique developed to ensure a reliable coverage performance. The technique balances the key operating parameters of transmission power and receiver sensitivity to improve the coverage of a focused area within the system.

The frustration of trying to use a cellphone inside a building and losing the call could be solved with the world's first GSM system for dedicated in-building coverage.

The picocell system uses a central controller connected to as many as 12 radio frequency units installed throughout a building or a compound. Larger areas can be covered by adding more controller units. The units are about 10cm deep and weigh less than 10kg.

Motophone has available a three-tier base station infrastructure, with Macrocells for wide area coverage, Microcells for street-level coverage, and Picocells for private dedicated in-building signals. Calls pass automatically from one level to another as the user moves. The call will also not be dropped as the user walks off the street and into a building served by a picocell.

Coverage strategy - areas such as shopping centers, stadiums, exhibition halls and other single areas of high cellphone users concentration where a standard coverage will no longer be enough, picocells installations will boost the capacity and quality of cellphone coverage.

As networks evolve, users experience capacity problems, a lot of public buildings are covered by standard cells but they need more intensive coverage and it has to be commercially viable. The picocell is the most cost effective network-expansion device.