Health and Safety Information173Availability of Various Features/Ring TonesMany services and features are network dependent and mayrequire additional subscription and/or usage charges. Not allfeatures are available for purchase or use in all areas.Downloadable Ring Tones may be available at an additionalcost. Other conditions and restrictions may apply. See yourservice provider for additional information.Battery Standby and Talk TimeStandby and talk times will vary depending on phone usagepatterns and conditions. Battery power consumption dependson factors such as network configuration, signal strength,operating temperature, features selected, frequency of calls,and voice, data, and other application usage patterns.Battery Precautions• Never use any charger or battery that is damaged in any way.• Use the battery only for its intended purpose.• If you use the phone near the network's base station, it uses lesspower; talk and standby time are greatly affected by the signalstrength on the cellular network and the parameters set by thenetwork operator.• Battery charging time depends on the remaining battery charge andthe type of battery and charger used. The battery can be charged anddischarged hundreds of times, but it will gradually wear out. When theoperation time (talk time and standby time) is noticeably shorter thannormal, it is time to buy a new battery.• If left unused, a fully charged battery will discharge itself over time.• Use only Samsung-approved batteries and recharge your battery onlywith Samsung-approved chargers. When a charger is not in use,disconnect it from the power source. Do not leave the battery