SAR value of a phone has to be mandatorily declared by the company that has made the phone. So you can easily find the SAR value for your smartphone by looking at the info label pasted on a phone's box. The SAR value is also declared by most smartphone companies in a sticker that they attach to the phone's body. You can see this sticker when you take out the phone for the first time out of the box. In case you have discarded the box in which your phone came or removed and threw that sticker that was pasted on the phone, you can check out the phone's specification page or manual on the website of the manufacture. There too a phone company lists the phone's SAR value. Finally, on many phones (but not all) the SAR value of the device can To check the SAR value of your phone look behind the packaging of your smartphone. You can also dial *#07# to check it. Dialling this code will bring up the regulatory information related to the phone's SAR value on its screen. It is important to note that due to different features in a phone in different countries, and due to different kind of cellular networks used in different countries, the SAR value of the same phone can wildly differ from country to country.
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