You allowed to use a phone the same way your use a GPS device? Mounted and using speakerphone?
You're not allowed to use GPS devices while the vehicle is moving, hence the warning that pops up (that no-one reads) every time you start the device. Same goes for built-in equipment (car radio, cigarette lighter, etc.), or 3rd party devices mounted to the windscreen.
http://www.cps.gov.uk/legal/p_to_r/...guidance_on_prosecuting_cases_of_bad_driving/



