South Wales Police issued 792 Fixed Penalty Notices (FPNs) in 2024, compared to 391 in 2023.
This amounts to £278,400 in fines over two years.
Michael Higgins, a solicitor at Accident Claims Advice, said: “The number of mobile phone driving offences is extremely worrying – especially given the potentially devastating consequences of someone not paying full attention when operating a vehicle.
“A road traffic accident caused by someone looking at their phone while driving could turn a person’s life upside down in a split second.”
By mid-May, 209 more fines had already been recorded in 2025.
Injuries have been linked to 15 road traffic accidents involving mobile phone use since 2023.
Nearby forces reported lower totals for the same period, with North Wales Police issuing 886 fines and Gwent Police 1,102 FPNs.
Using a handheld device while driving has been an offence since 2003, with penalties increasing in 2022.
