**5.1 Measuring mobile phones' RFW strength**

 To confirm the emission of RFW from different mobile sets and to understand its strength, we decided to measure the RFW from different mobile sets using a TriField meter. It was found that the old mobile sets were emitting very high intensity of RFW which the TriField meter showing above 1 mW/cm<sup>2</sup> . Absolute hazard thresholds have not been established yet; however, studies suggest that RFW above 0.1 mW/cm<sup>2</sup> may not be safe. Our study revealed that most of the smart mobile sets are emitting RFW above 0.1 mW/cm<sup>2</sup> . According to our classification, only group 1 comes under 0.1 mW/cm<sup>2</sup> ; groups 2, 3 and 4 are all above this threshold.
