According to this mobile phone article in the Guardian, mobile phone insurance is a waste of money, is often invalidated withouth the customer knowing and most people could save around £100 per year if they didn’t have it. Apparently a handset could be replaced for around £40.
It said though that cover for unauthorised calls isn’t taken into account. Surely this is the main reason for having the insurance. I have a friend who had £1200 of unauthorised calls on his stolen phone. He wished he had taken the insurance.