mobile phone shops

Some mobile phones purchased from mobile phone shops in the uk can be used on more than one network, therefore offering you better coverage and better transmission.

Digital networks
GSM 900 (transmitting on the 900 MHz frequency band) is Europe's main digital network.
GSM 1800 (transmitting on the 1800 MHz frequency band) is also used in Europe and Asia.
GSM 1900 (transmitting on the 1900 MHz frequency band) is the GSM system used mainly in the Americas and Canada.
TDMA is a digital standard used primarily in the US.
You can find out more info about digital networks from mobile phone shops in the uk.

mobile phones

Analog networks
AMPS is used mainly in the US.
ETACS is used in Europe and Asia-Pacific.
NMT is used in Scandinavia and other European countries, also in Asia-Pacific.
Different types of mobile phones are designed to work on different types of network.
Some models of mobile phones may not be available from mobile phone shops in some countries because of the different networks. If a mobile runs on a network that is used in a particular country, then that countries shops may not sell that model of mobile phone.

You can find out more info about anolog networks from mobile phone shops in the uk.