Radiation in Cell Phones
Mobile phones are microwave transmitters.
Modern day smartphones have about 5 transmitters which all emit radiation.
When not using certain functions of your cell phone e.g. Bluetooth, WiFi, Data (3G-4G), these can and should be disabled, and the phones should never be kept close to your skin (manufacturers recommend a minimum of 15mm).
The phone should be used on speaker or better still through the use of an airtube headset.