Single/dual/tri band
The band is the radio frequency a network uses. T-Mobile UK
uses 1800MHz. All current T-Mobile phones are either dual
band (900/1800MHz) or tri-band (900/1800/1900MHz). Some older
phones may be single band (1800MHz).
Satellite phones
These are not dependent on land-based networks because they
send and receive signals via satellite. You can use satellite
phones across very wide areas; some work worldwide.
What’s my phone?
Your phone’s manual will say what band(s) it uses.
Alternatively call the manufacturer or look on their website.
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