The study found that even without the hands-free kits, SARs from all three sets remained below Australian standards.

BBC: Hands-free mobiles given safety boost

The new Australian study found, however, that using hands-free kits can reduce the effects of electromagnetic radiation by more than 90%.

BBC: Hands-free mobiles given safety boost

But the UK study suggested that instead of offering protection, some hands-free kits acted as aerials and tripled the amount of radiation reaching the brain.

BBC: Hands-free mobiles given safety boost