Forcing restart, Resetting the device | Samsung SM-G390FZKAILO

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 →General management →Reset →Factory data reset

→RESET →DELETE ALL. Before performing the factory data reset, remember to make backup copies of all important data stored in the device.

If you registered a Google account to the device, you must sign in to the same Google account after resetting the device.

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Samsung SM-G390FZKAILO manual Forcing restart, Resetting the device

Contents

SM-G390F SM-G390Y Table of Contents Appendix Read me first Basics Instructional icons Device overheating situations and solutionsWhen the device heats up while charging the battery Do the following when the device heats up When the device heats up during use Precautions for operating environment Device limitations when the device overheats Maintaining water and dust resistance Package contents Device layout Recents Keys Installing the battery Battery Removing the battery Charging the battery Viewing the estimated charging time Battery charging tips and precautionsReducing the battery consumption Maximum power saving mode Power saving mode SIM or Usim card microSIM card Installing the SIM or Usim card Removing the SIM or Usim card Installing a memory cardMemory card microSD card Removing the memory card Formatting the memory card Attaching a hand strap Restarting the device Turning the device on and offControlling the touchscreen Dragging TappingTapping and holding Spreading and pinching Double-tappingSwiping Home screen Home screen Adding items Home screen options Creating folders Moving itemsRemoving items Managing panels Using quick optionsApps screen Rearranging items Searching for items Indicator icons Lock screen Notification panel Using the notification panel Using quick setting buttons Finder Searching for content or nearby devicesSetting search categories Entering text Changing the keyboard layout Additional keyboard functionsChanging the input language Capturing a screenshot Screen captureOpening apps Copying and pasting Introduction Secure Folder Creating Secure Folder Setting auto lock for Secure FolderMoving content Removing apps from Secure Folder Adding appsAdding accounts Hiding Secure Folder Multi window Uninstalling Secure Folder Split screen view Adjusting the window size Using additional options Maximising a window Sharing text or images between windowsMinimising the split screen view Registering an existing Samsung account Samsung accountRegistering your Samsung account Registering a new Samsung account Removing your Samsung account Transferring data via Smart SwitchTransferring data from your previous device Transferring data wirelessly via Wi-Fi Direct On the computer, launch Smart Switch Transferring backup data from a computer Transferring data via Samsung Cloud Connecting the device to a computer for data transferDevice and data management Updating over the air Updating with Smart SwitchUpdating the device Backing up and restoring data Performing a data resetUsing a Samsung account Using a Google account Sharing features Deactivating emergency mode Emergency mode Play Store Installing or uninstalling appsInstalling apps Galaxy Apps Enabling apps Uninstalling or disabling appsSetting app permissions Managing apps Making calls Phone Receiving calls During a voice call Blocking phone numbersOptions during calls Missed calls Creating a new contact ContactsAdding contacts During a video call Enter contact information Adding a phone number to Contacts from the keypad Synching contacts with your web accounts Adding a phone number to Contacts from the calls listImporting contacts Sharing contacts Searching for contacts Deleting contacts MessagesMerging duplicate contacts Viewing messages Sending messages Blocking unwanted messages Setting the message notificationSetting a message reminder Browsing webpages Internet Deactivating secret mode Using secret modeActivating secret mode Changing security settings Reading emails CameraSending emails Launching Camera Using swipe gestures Taking photos or recording videos Basic shooting Locking the focus AF and exposure AE Customising shooting modes Auto modePro mode Continuous shot Panorama Sports HDR Rich toneNight Tag shot Selfie Using the selfie flashSound & shot Applying beauty effects Wide selfie Applications Camera settings Camera settingsQuick settings Common Gallery Viewing images Viewing images and videos Viewing videos Viewing albumsViewing stories Deleting stories Syncing images and videos with Samsung CloudDeleting images or videos Creating stories Deleting multiple images and videos Samsung NotesSharing images or videos Creating notes Deleting notes Calendar Creating tasks Creating events Starting S Health HealthSyncing events and tasks with your accounts Monitor your health and fitness Using S Health Additional information Making voice recordings Voice Recorder My Files Setting alarmsStopping alarms Deleting alarms Deleting clocks Creating clocks Listening to the FM radio CalculatorRadio Scanning radio stations Google apps Google PhotosDuo Connections Wi-FiConnecting to a Wi-Fi network Introduction Tap Connect Wi-Fi Direct Ending the device connection Bluetooth Sending and receiving data Pairing with other Bluetooth devices Data usage Unpairing Bluetooth devices Limiting data usage Flight modeNFC and payment Making payments with the NFC feature Using the NFC feature Sending data Mobile hotspot and tethering Using the mobile hotspot Location More connection settingsMobile networks Adding printer plug-ins Printing Download booster Sounds and vibration Options NotificationsDisplay Blue light filter Easy mode Managing shortcuts Advanced featuresSwitching to easy mode Wallpapers and themes Send SOS messages Adding emergency contacts Device maintenance Storage Using the quick optimisation featureBattery Device security AppsLock screen and security Memory Samsung Cloud Cloud and accounts Removing accounts AccountsManage cloud storage Adding accounts Google AccessibilityBackup and restore General management About device Software update Appendix Troubleshooting Forcing restart Resetting the device 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 Trademarks Copyright