Absolutely not leave the phone near children.
When talking on the phone, try to keep the phone as far away as possible ( for example by turning on the speaker ). The amplitude of the electromagnetic field ( radiation ) will be reduced by up to 4 times if kept about 5 cm away and 50 times more if about 1m away.
Avoid using a mobile phone when the signal is weak or when you are traveling at a high speed such as a car or a train, because the wave intensity will automatically increase to the maximum when the phone must be continuous connect to a new relay antenna.
Do not take your mobile phone anytime, anywhere. Do not leave your phone near you at night like under a pillow or on a bedside table, especially for pregnant women. If not, leave the flight mode on or off.
Mobile phones should not be held anywhere.
When holding the phone, always remember to have the keyboard face facing you and the phone head facing outside so that the phone wave does not shine through you.
You should only use your mobile phone for a few minutes because the biological effects are directly related to the time of exposure. If you have to talk longer, use a landline instead of a mobile phone.
Change the position of the phone frequently while talking so that the electromagnetic wave does not focus on a single point on your body. When calling someone, let them catch the phone before handing the phone to the headset. This will help reduce the force of the electromagnetic field near your ear and the time you have to contact it.
If possible, take the time to text instead of calling.
Avoid using cell phones in public places like buses to limit the impact of electromagnetic fields on everyone around you.
Select the device with the lowest SAR ( Specific Absorption Rate ). SAR is a unit that measures the level of electromagnetic energy absorbed by the body when using a mobile phone.
You can search the SAR of the phones by searching for ' sar ratings cell phones ' on the Internet.