How do 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