Can I say,
He called the police station with / over / on his mobile phone. He told the police what had happened.
quote:Why? Because we always use the preposition on with things like TV's, radios, and phones.
quote:I think no apostrophe is needed, though we see both versions being used.
quote:BTW, do you use an apostrophe for pluralizing abbreviations, Richard? CD's or CDs?! I think no apostrophe is needed, though we see both versions being used.