Nearly 12,000 motorists have been fined since a ban on using hand-held cell phones while driving was introduced 18 months ago.
On average 650 tickets per month have been issued since the ban came into force in 2009.
But in the past 12 months, the average has been higher, at more than 700 per month.
The Automobile Association says the number of infringement notices issued is disappointing.
Motoring affairs general manager Mike Noon says it shows awareness of the law is dropping and complacency is setting in.
He says people need to realise that using hand-held cell phones when driving is dangerous.
Police say they agree that motorists might be getting complacent about the ban.