Don't want to scare you but a microwave oven is allowed to leak a maximum of 0.5 milliwatts at a distance of 5cm away, a mobile phone transmits about 1-2 Watts located directly against the head. The phone according to my delapitating maths means the phone is 10-20,000 times more powerfull than a maximum leak on a microwave, but as they both transmit at different frequencies the effects could be totally different. But we all know what happen when you place meat in a microwave !!