Samsung SM-J120HZKDXXV, SM-J120HZDDKSA, SM-J120HZKDKSA, SM-J120HZWDKSA Appendix, Troubleshooting

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Appendix

Troubleshooting

Before contacting a Samsung Service Centre, please attempt the following solutions. Some situations may not apply to your device.

When you turn on your device or while you are using the device, it prompts you to enter one of the following codes:

Password: When the device lock feature is enabled, you must enter the password you set for the device.

PIN: When using the device for the first time or when the PIN requirement is enabled, you must enter the PIN supplied with the SIM or USIM card. You can disable this feature by using the Lock SIM card menu.

PUK: Your SIM or USIM card is blocked, usually as a result of entering your PIN incorrectly several times. You must enter the PUK supplied by your service provider.

PIN2: When you access a menu requiring the PIN2, you must enter the PIN2 supplied with the SIM or USIM card. For more information, contact your service provider.

Your device displays network or service error messages

When you are in areas with weak signals or poor reception, you may lose reception. Move to another area and try again. While moving, error messages may appear repeatedly.

You cannot access some options without a subscription. For more information, contact your service provider.

Your device does not turn on

When the battery is completely discharged, your device will not turn on. Fully charge the battery before turning on the device.

The battery may not be inserted properly. Insert the battery again.

Wipe both gold-coloured contacts and insert the battery again.

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Contents SM-J120F/DS SM-J120H/DS Table of Contents Appendix Read me first BasicsPackage contents Device layout Keys Installing the battery BatteryRemoving the battery Charging the battery Battery charging tips and precautions Reducing the battery consumptionViewing the remaining charging time Ultra power saving mode Power saving modeSIM or Usim card Installing the 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 Removing the memory card On the Home screen, tap →Settings →Storage →Unmount SD cardTurning the device on and off TouchscreenFormatting the memory card Tapping Tapping and holdingDragging Double-tapping SwipingSpreading and pinching Home screen Home screenAdding items Home screen optionsCreating folders Moving and removing an itemApps screen Managing panelsMoving items Basics Icon Meaning Indicator iconsLock screen Password Using the notification panelNotification panel PatternSingle SIM models Entering text Using quick setting buttonsKeyboard layout Changing the input languageScreen capture Additional keyboard functionsCopying and pasting Device and data management Opening appsTransferring data from your previous device Closing an appTransferring data from a computer Using the device as a removable disk for data transferUpdating with Smart Switch Updating the deviceUpdating over the air Performing a data reset Using a Google accountBacking up and restoring data Installing apps Installing or uninstalling appsGalaxy Apps Play StoreManaging apps PhoneIntroduction Making callsTo make a video call Receiving calls Missed calls Options during callsDuring a voice call During a video callAdding contacts ContactsCreating contacts manually Importing contactsMessages Searching for contactsSending messages Add recipients and enter a message Viewing messages InternetSetting up email accounts Basic shooting CameraSending emails Reading emailsTaking photos or recording videos Auto mode Pro modeLaunching Camera on the locked screen Continuous shot PanoramaBeauty face Sound & shotCamera settings Quick settingsSelfie Camera settings Viewing images or videos GalleryDeleting images or videos Deleting an image or a videoDeleting multiple images and videos Smart Manager Battery Using the quick optimisation featureManaging device performance StorageCreating events PlannerSyncing events and tasks with your accounts Creating tasksVideo Voice Recorder Memo My FilesComposing memos Searching for memosAlarm ClockWorld clock Timer CalculatorStopwatch Listening to the FM radio RadioScanning radio stations Google appsPlay Movies & TV Google SettingsDrive YouTubeWi-Fi Connecting to a Wi-Fi networkIntroduction Sending and receiving data Wi-Fi DirectEnding the device connection BluetoothSending and receiving data Pairing with other Bluetooth devicesFlight mode Unpairing Bluetooth devicesMobile hotspot and tethering Data usage Using the mobile hotspotSIM card manager dual SIM models Mobile networksLimiting data usage Options More connection settingsPrinting Adding printer plug-insPrinting content Sounds and notificationsDisplay Applications WallpaperLock screen and security Privacy AccessibilityAdding accounts AccountsRegistering Samsung accounts Removing accounts Language and input Backup and resetStorage About device Date and timeAppendix TroubleshootingResetting 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 Trademarks Copyright
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