84Signal StrengthThe quality of each call you make or receivedepends on the signal strength in your area.Your phone informs you of the current signalstrength by displaying a number of bars next tothe signal strength icon. The more barsdisplayed, the stronger the signal. If you’reinside a building, being near a window may giveyou better reception.Understanding How Your PhoneOperatesYour phone is basically a radio transmitter andreceiver. When it’s turned on, it receives andtransmits radio frequency (RF) signals. Whenyou use your phone, the system handling yourcall controls the power level. This power canrange from 0.006 watts to 0.2 watts.Allow only qualified personnel toservice your phoneAllowing unqualified personnel to service yourphone may result in damage to your phone andwill void your warranty.Ensure maximum battery andcharger life• Avoid charging batteries for more than aweek, as overcharging may shorten batterylife.• Over time, unused batteries will dischargeand must be recharged before use.Important usage information