Samsung SM-J120FZKNATO manual Restarting the device, Forcing restart, Resetting the device

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Appendix

The touchscreen responds slowly or improperly

If you attach a screen protector or optional accessories to the touchscreen, the touchscreen may not function properly.

If you are wearing gloves, if your hands are not clean while touching the touchscreen, or if you tap the screen with sharp objects or your fingertips, the touchscreen may malfunction.

The touchscreen may malfunction in humid conditions or when exposed to water.

Restart your device to clear any temporary software bugs.

Ensure that your device software is updated to the latest version.

If the touchscreen is scratched or damaged, visit a Samsung Service Centre.

Your device freezes or encounters a fatal error

Try the following solutions. If the problem is still not resolved, contact a Samsung Service Centre.

Restarting the device

If your device freezes or hangs, you may need to close apps or turn off the device and turn it on again.

Forcing restart

If your device is frozen and unresponsive, press and hold the Power key and the Volume Down key simultaneously for more than 7 seconds to restart it.

Resetting the device

If the methods above do not solve your problem, perform a factory data reset.

On the Apps screen, tap Settings Backup and reset Factory data reset RESET DEVICE ERASE EVERYTHING. Before performing the factory data reset, remember to make backup copies of all important data stored in the device.

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Contents SM-J120FN SM-J120G/DS SM-J120H/DS SM-J120ZN Table of Contents Appendix Basics Read me firstPackage contents Device layout Keys Battery Installing the batteryRemoving the battery Charging the battery Battery charging tips and precautions Reducing the battery consumptionViewing the remaining charging time Power saving mode Ultra power saving modeInstalling the SIM or Usim card SIM or Usim cardReplace the battery and back cover Removing the SIM or Usim card Using dual SIM or Usim cards dual SIM models Installing a memory cardMemory card On the Home screen, tap →Settings →Storage →Unmount SD card Removing the memory cardTurning the device on and off TouchscreenFormatting the memory card Tapping Tapping and holdingDragging Double-tapping SwipingSpreading and pinching Home screen Home screenHome screen options Adding itemsMoving and removing an item Creating foldersApps screen Managing panelsMoving items Basics Indicator icons Icon MeaningLock screen Using the notification panel PasswordNotification panel PatternSingle SIM models Using quick setting buttons Entering textKeyboard layout Changing the input languageScreen capture Additional keyboard functionsCopying and pasting Opening apps Device and data managementTransferring data from your previous device Closing an appUsing the device as a removable disk for data transfer Transferring data from a computerUpdating with Smart Switch Updating the deviceUpdating over the air Performing a data reset Using a Google accountBacking up and restoring data Installing or uninstalling apps Installing appsGalaxy Apps Play StorePhone Managing appsIntroduction Making callsTo make a video call Receiving calls Options during calls Missed callsDuring a voice call During a video callContacts Adding contactsCreating contacts manually Importing contactsMessages Searching for contactsSending messages Add recipients and enter a message Internet Viewing messagesSetting up email accounts Camera Basic shootingSending emails Reading emailsTaking photos or recording videos Auto mode Pro modeLaunching Camera on the locked screen Panorama Continuous shotBeauty face Sound & shotCamera settings Quick settingsSelfie Camera settings Gallery Viewing images or videosDeleting images or videos Deleting an image or a videoDeleting multiple images and videos Smart Manager Using the quick optimisation feature BatteryManaging device performance StoragePlanner Creating eventsCreating tasks Syncing events and tasks with your accountsVideo Voice Recorder My Files MemoComposing memos Searching for memosAlarm ClockWorld clock Timer CalculatorStopwatch Radio Listening to the FM radioGoogle apps Scanning radio stationsGoogle Settings Play Movies & TVDrive YouTubeWi-Fi Connecting to a Wi-Fi networkIntroduction Wi-Fi Direct Sending and receiving dataBluetooth Ending the device connectionPairing with other Bluetooth devices Sending and receiving dataFlight mode Unpairing Bluetooth devicesMobile hotspot and tethering Using the mobile hotspot Data usageSIM card manager dual SIM models Mobile networksLimiting data usage NFC and payment NFC-enabled models Using the NFC featureMaking payments with the NFC feature Sending dataMore connection settings OptionsPrinting Adding printer plug-insPrinting content Sounds and notificationsDisplay Applications WallpaperLock screen and security Accessibility PrivacyAccounts Adding accountsRegistering Samsung accounts Removing accountsBackup and reset Language and input Storage Date and time About deviceTroubleshooting AppendixResetting the device Restarting the deviceForcing restart Sound echoes during a call Battery depletes faster than when first purchased Photo quality is poorer than the preview Your device cannot find your current location Copyright Trademarks
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