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SAR – How dangerous is your Smartphone? Claim

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Important points:

  • Dial USSD Code *#07# to check the SAR Value of your smartphone.
  • If it is greater than 1.6 watts per kilogram, change your phone immediately!


Nowadays one cannot imagine their life without a mobile phone. The use and abuse of mobile phones needs no introduction. However, most people are unaware of the health hazards that can be caused by cell phones.

Radiation hazard is the most dangerous hazard of the cell phone and can cost your life. Hence you should be aware of the SAR Value of your smart phone. The more the SAR Value, the more dangerous is the radiation hazard!

Specific absorption rate (SAR) is a measure of the rate at which energy is absorbed by the human body when exposed to a radio frequency (RF) electromagnetic field.

It is also defined as the power absorbed per mass of tissue and has units of watts per kilogram(W/kg).

Federal Communications Commission (FCC) has adopted limits for safe exposure to radio frequency (RF) energy  which is  1.6 watts per kilogram (1.6 W/kg).  Any smartphone  at or below this SAR levels is “safe” to use.

You can check Radiation level in terms of SAR of your smartphone by dialing a USSD code*#07#, if results shows SAR below 1.6 watts per kilogram (1.6 W/kg) then it is OK otherwise you are advised to change your smartphone immediately.

Various governments have defined maximum SAR levels for RF energy emitted by mobile devices:

United States:  

The FCC requires that phones sold have a SAR level at or below 1.6 watts per kilogram (W/kg) taken over the volume containing a mass of 1 gram of tissue that is absorbing the most signal.


European Union:

CENELEC specify SAR limits within the EU, following IEC standards. For mobile phones, and other such hand-held devices, the SAR limit is 2 W/kg averaged over the 10 g of tissue absorbing the most signal (IEC 62209-1).



Switched from the EU limits to the US limits for mobile handsets in 2012. Unlike the US, India will not rely solely on SAR measurements provided by manufacturers; random compliance tests are done by a government-run Telecommunication Engineering Center (TEC) SAR Laboratory on handsets and 10% of towers. All handsets must have a hands free mode.

Here are SAR level of some popular smartphones in the market.

According to PhonAndroid, the Galaxy S7 edge’s SAR value was 0.264W/kg, the lowest among the ten most popular smartphones. It was followed by the Asus Zenfone 3 with 0.278W/kg, the Galaxy A5 (2016) with 0.290W/kg, and the Lenovo Moto Z with 0.304W/kg.

The Honor 8 and P9 smartphones by Huawei had the highest SAR value in the test with 1.5W/kg and 1.43W/kg, respectively. The Apple iPhone 7 Plus and the iPhone 7 came in at the seventh and eighth positions with SAR values of 1.24W/kg and 1.38W/kg.


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