Sony Ericsson T28 World User Guide - Page 114
Antenna Care and Replacement, Efficient Phone Operation, Radio Frequency Energy
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EricssonNoMtofboilreCCoommmmerucniiaclatUisoens AB Antenna Care and Replacement • To avoid impaired performance please ensure your mobile phone's antenna is not bent or damaged. • Do not remove the antenna yourself. If your phone's antenna is damaged please take it to a Certified Service Partner. • Only use an antenna that has been specifically designed for your phone. Unauthorized antennas, modifications, or attachments could damage the phone and may violate the appropriate regulations causing loss of performance and radio frequency (RF) energy above the recommended limits. Efficient Phone Operation To enjoy optimum performance with minimum power consumption please: • Hold the phone as you would any other telephone. While speaking directly into the mouthpiece, angle the antenna in a direction up and over your shoulder. If the antenna is extendable/retractable, it should be extended during a call. • Do not hold the antenna when the phone is in use. Holding the antenna affects call quality, may cause the phone to operate at a higher power level than needed and shorten talk and standby times. If your mobile phone is equipped with an infrared eye, never direct the infrared ray at anyone's eye and make sure that it does not disturb any other infrared units. Radio Frequency Energy Your mobile phone is a radio transmitter and receiver. When the phone is turned on, it receives and transmits radio frequency (RF) energy. Depending on the type of mobile phone you possess, it operates on different frequency ranges and employs commonly used modulation techniques. The system that handles your call when you are using your phone controls the power level at which your phone transmits. 114 Guidelines for Safe and Efficient Use