- Hidden in the Instructions for some smartphones is a warning not to carry the phone up against your body. Apple iPhone instructions recommend "When using iPhone near your body for voice calls or for wireless data transmission over a cellular network, keep iPhone at least 5/8inch away from the body ..." Blackberry Curve 8900 Smartphone recommend that you put the Blackberry device in a Blackberry device holster ... If you do not use such a holster "keep the Blackberry device at least 0.98 inches (25mm) from your body when the Blackberry device is turned on and connected to a wireless network."
- Using a mobile phone in a car, train or bus magnifies the fields.
- Having a DECT cordless phone in your home or office creates a microwave field 24/7. This emanates from the base station all the time and from the handset when it is in use.