Are low SAR mobile phones safer?
No. The maximum SAR varies for a number of reasons including the type and location of the antenna, the operating frequency, and test position. However these variations do not mean that there are variations in safety.
Variations in the maximum reported SAR reflect that they were recorded under different conditions but are also influenced by technical parameters such as the antenna used and its placement within the device.
SAR is designed to demonstrate compliance with the relevant national or international limits, and in doing so, can be derived from a wide variety of testing configurations that are rarely directly comparable or even reflective of everyday usage conditions.
The declared maximum SAR value of a phone does not for example reflect that once a call is established the mobile phone will power down to the minimum power level required to reach the base station and maintain a quality call.