169Availability 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.Battery Precautions• Avoid dropping the cell phone. Dropping it, especially on a hard surface, canpotentially cause damage to the phone and battery. If you suspect damage to thephone or battery, take it to a service center for inspection.• 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 less power; talk andstandby time are greatly affected by the signal strength on the cellular networkand the parameters set by the network operator.• Follow battery usage, storage and charging guidelines found in the user’s guide.• Battery charging time depends on the remaining battery charge and the type ofbattery and charger used. The battery can be charged and discharged hundreds oftimes, but it will gradually wear out. When the operation time (talk time andstandby time) is noticeably shorter than normal, 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 only withSamsung-approved chargers. When a charger is not in use, disconnect it from thepower source.• Do not use incompatible cell phone batteries and chargers. Some Web sites andsecond-hand dealers, not associated with reputable manufacturers and carriers,might be selling incompatible or even counterfeit batteries and chargers.Consumers should purchase manufacturer or carrier recommended products andaccessories.• Extreme temperatures will affect the charging capacity of your battery: it mayrequire cooling or warming first.