According to IOL.co.za, the wigged ones of Hamm believed that Walter Klein had not been using the phone to make a call.
Instead they accepted that he was using the nice warm phone to warm his ears.Now we know this might sound like the weakest excuse ever. But Klein did have some evidence.
He pulled all his phone records to show that no calls had been made during the period before he was fingered by the coppers.
The phone was being recharged and was nice and warm. Klein had an earache and the cab was freezing so he clamped the phone to his shell-likes to defrost them.
It is the danger of being too specific in your law writing. The law states that you should make calls only using 'hands free' devices. You are just as likely to plough your rig through school buses or drive through a red light trying to balance a warm phone between your ear and shoulder as you are when you are actually making a call.