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1.  Is a mobile device with a lower SAR rate always better? 

It’s possible that a user with low SAR rate device is more exposed than the person using a higher SAR rated mobile device. Because the amount of exposure is influenced by the coverage and other obstacles such as walls, moving or not moving, distance from the antenna. These things determine how hard the phone has to work to establish and keep the connection.
So it’s for example possible that a rural user with a low SAR rated phone is more exposed due to the distance of the antenna and the coverage than a urban user with a high SAR rate mobile device. 

2.   What about handsfree calling?

Handsfree calling will reduce the level of radiation exposure a lot.   

3.   Handsfree wired or wireless?

Wired handsfree calling is a very good option, however chances are there that the radiation will be transported through the wire to the head. Best is a Bluetooth headset, this kind of accessory can have radiation as well but it’s 300-1000x lower than the normal use of a mobile phone.

4.   Do smartphones have a higher SAR rate?

No, because 3G technology is much more efficient than 2G. You can say that the radiation exposure on a 3G network will be lower compared to a 2G network. Hence you have a good 3G coverage.  

5.   What is the Health risk?

According to certain studies the intensive use of a mobile phone could increase the risk of brain cancer. Therefore, the International Agency on Research on Cancer (IARC) has classified the radiowaves as “possible carcinogenic”. However the relation between the use of a mobile phone and an increase of the risk on brain cancer haven’t been proven so far.  

6.   What if I use Wi-Fi to make calls with my mobile device?

When you use Wi-Fi for your calls there’s also a radiation but this is many times lower than a call through the mobile network. Use of a Bluetooth headset is advised as well with Wi-Fi calls. Of course an IP call can lead to an extra cost by the Ip-carrier.

7. What about the Anti-radiation stickers?

They are nice, but scientific studies have never proven they work.