Basics16Fast chargingThe device has a built-in fast charging feature. You can charge the battery more quickly whilethe device or its screen is turned off.Increasing the charging speedTo increase the charging speed, turn the device or its screen off when you charge the battery.If the fast charging feature is not activated, launch the Settings app, tap Device care →Battery, and then tap the Fast cable charging switch to activate it.• While charging, you cannot activate or deactivate this feature.• You cannot use the built-in fast charging feature when you charge the batteryusing a standard battery charger.• If the device heats up or the ambient air temperature rises, the charging speed maydecrease automatically. This is a normal operating condition to prevent damage tothe device.SIM or USIM card (nano-SIM card)Installing the SIM or USIM cardInsert the SIM or USIM card provided by the mobile telephone service provider.For dual SIM models, you can insert two SIM or USIM cards so you can have two phonenumbers or service providers for a single device. In some areas, data transfer speeds may beslower if two SIM cards are inserted in the device than when one SIM card is inserted.• Use only a nano-SIM card.• Use caution not to lose or let others use the SIM or USIM card. Samsung is notresponsible for any damages or inconveniences caused by lost or stolen cards.Some services that require a network connection may not be available depending onthe service provider.
