127Understanding How Your Phone OperatesYour phone is basically a radio transmitter and receiver. When it's turned on, itreceives and transmits radio frequency (RF) signals. When you use your phone, thesystem handling your call controls the power level. This power can range from 0.006watts to 0.2 watts in digital mode.Maintaining Your Phone's Peak PerformanceFor the best care of your phone, only authorized personnel should service yourphone and accessories. Faulty service may void the warranty.There are several simple guidelines to operating your phone properly andmaintaining safe, satisfactory service.• If your phone is equipped with an external antenna, hold the phone with theantenna raised, fully-extended and over your shoulder.• Do not hold, bend or twist the phone's antenna, if applicable.• Do not use the phone if the antenna is damaged.• If your phone is equipped with an internal antenna, obstructing the internalantenna could inhibit call performance.• Speak directly into the phone's receiver.• Avoid exposing your phone and accessories to rain or liquid spills. If your phonedoes get wet, immediately turn the power off and remove the battery. If it isinoperable, call Customer Care for service.Availability of Various Features/Ring TonesMany services and features are network dependent and may require additionalsubscription and/or usage charges. Not all features are available for purchase or usein all areas. Downloadable Ring Tones may be available at an additional cost. Otherconditions and restrictions may apply. See your service provider for additionalinformation.Battery Standby and Talk TimeStandby and talk times will vary depending on phone usage patterns and conditions.Battery power consumption depends on factors such as network configuration,signal strength, operating temperature, features selected, frequency of calls, andvoice, data, and other application usage patterns.
