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Mobile Safety Canadian Center for Child Protection
 
Mobile Phone Technology

How do mobile phones work?

How mobile phones work
  • When you make a call, your mobile phone transmits to the nearest base station at one frequency
  • When the signal reaches a base station, it is transmitted to the main telephone network, either by telephone cables or by another radio link at a different frequency
  • The nearest base station to the person you are calling sends the signal to that mobile phone
  • Incoming and outgoing signals from the handset have different frequencies so they don't interfere with one another
  • Base stations continuously transmit low power waves to handsets
  • Handsets only transmit radio waves when a call is in progress

 
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