Sony Ericsson W200i Benutzerhandbuch

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Mobile phones operate using radio signals, which cannot guarantee 
connection in all conditions. You should therefore never rely solely 
upon any mobile phone for essential communications (e.g. medical 
emergencies).
Emergency calls may not be possible in all areas, on all cellular 
networks, or when certain network services and/or mobile phone 
features are in use. Check with your local service provider.

This phone contains a built-in antenna. Use of antenna devices not 
marketed by Sony Ericsson specifically for this model could damage 
your mobile phone, reduce performance, and produce SAR levels 
above the established limits (see below).

Hold your mobile phone as you would any other phone. Do not cover 
the top of the phone when it is in use, as this affects call quality and 
may cause the phone to operate at a higher power level than needed, 
thus shortening talk and standby times.

Your mobile phone is a low-power radio transmitter and receiver. 
When it is turned on, it emits low levels of radio frequency energy 
(also known as radio waves or radio frequency fields).
Governments around the world have adopted comprehensive 
international safety guidelines, developed by scientific organizations, 
e.g. ICNIRP (International Commission on Non-Ionizing Radiation 
Protection) and IEEE (The Institute of Electrical and Electronics 
Engineers Inc.), through periodic and thorough evaluation of 
scientific studies. These guidelines establish permitted levels of radio 
wave exposure for the general population. The levels include a safety 
margin designed to assure the safety of all persons, regardless of 
age and health, and to account for any variations in measurements.