Police saw a man using a hand-held mobile phone whilst driving in a car park at Broughshane.
Michael Robinson (25), with an address listed as the Craigywarren area, was detected on May 11 this year.
A defence solicitor said the defendant, who admitted the offence, had acted “foolishly” and came before court with points already on his licence.
The solicitor said Robinson “assists” his “elderly grandmother” and his driving licence was therefore important.
That prompted District Judge Nigel Broderick to tell Ballymena Magistrates Court, on Thursday: “He is relying upon his granny to keep his licence effectively”.
The judge said he was not impressed with Robinson’s previous record.
The defendant was given three penalty points and fined £200.