The GSM network was developed in response to a need
for a system, which could be used all over Europe and would allow
its users to receive and make calls from a number which was not attributable
to any geographical area. The GSM system was designed to also enable
the customer to be billed by just one operator and pay for only one
line rental.
GSM is the most widespread mobile system and is now used by more than
50% of the phones worldwide, which was largely as a result of early standardisation
by the European authorities. It is available in over 140
countries, although there are now four different frequencies upon
which it operates; 450, 900, 1800 and 1900MHz. |
