Vauxhall Astra Owner's Manual page 55

Always use the hands-free equipment to
mak e telephone c alls w hilst driving. This
can also be a distraction when driving.
Please observe country-specific laws.
When used in the vehicle interior, mobile
telephones and ra dio equipment (CB)
with integrated aerial m ay cause
malfunctions in the vehicle electronics.
Mobile telephones and rad io equipment
(C B) should only b e used with an aerial
fitted on the v ehicle exterior.
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