Find hidden pictures in Android Device

1. Open My Files app.
2. Tap the Menu key and then select Settings.
3. Check the box besides the Show hidden files option to enable this option.
4. Tap the Back key.
5. Tap All files.
6. Tap Device storage.
7. Scroll down to find the folder named .hide and then tap it to open it.
8. Tap Island (I don't know why Samsung used it as the folder name. I think it may be different in other phones so please let me know if your phone has another folder name).
9. Now you should see all pictures you have hidden by using the hide items option in the Gallery app are displayed here.
10. Copy/move and then paste the desired hidden pictures to another folder. Use the following steps if you don't know how to do so:
• Select the desired pictures you want to copy/move.
• Tap the three horizontal line icon  located at the top right corner of the screen and then tap Copy to copy the selected files or tap Move to cut the selected files.
• Navigate to the required folder you want to paste the files.
• Tap Paste here.
11. Once the selected files are copied or moved to another folder, they should be displayed again in the Gallery app.

As a note, this method also can be applied to retrieve hidden video files that you have hidden using the same way from the Gallery app. You can also perform this method by using another third-party File Manager app (e.g: ES File explorer, Astro File Manager, etc).

How to fix Google Play Error Codes(403,491,495,919,921)

Google Play will provide a pop-up error message when there is an issue installing or updating your apps. Unfortunately, the error message text is very brief and doesn't explain how you can fix it. For example, error 921:

"Unknown error code during application install (921)."

Error 403

Solution: This issue usually comes up on devices with multiple accounts. Make sure you're accessing the Google Play Store from the correct account. Next, uninstall the app you were trying to update, then re-download from the correct account.

Error 491

Solution: Remove your current Google account, re-add the account, and then clear data from the Google Services app (Settings > Application Manager > Google Services).

Error 495

Solution: Delete the data from both the Google Play and Google Services Framework apps (Settings > Application Manager > Google Play and Google Services). Next, remove your Google account, restart the device, and then re-add your Google account.

Error 919

Solution: Your device has run out of storage space. You can clean your cache, remove unused apps, or delete photos and videos.

Error 921

Solution: Delete the cache from the Google Play app (Settings > Application Manager > Google Play). If you are still seeing an error, delete the data from the Google Play app (Settings > Application Manager > Google Services). Finally, if issues persist, delete your Google account and then re-add it.

Wipe the cache partition:

1. Hold power button and select 'Power Off'

2. With device off, hold 'Volume Down' button and press power button. An image of an Android lying on its back will appear.

3. Press the Volume Down key twice until "Recovery mode" appears on the screen.

4. Press the Power key to restart in "Recovery mode." An image of an Android with a red triangle will appear.

5. While holding down the Power key, tap the Volume Up key.

6. The Android System Recovery screen will appear. Release all keys.

7. Use the Volume keys to scroll to wipe data cache partition and press the Power key to select.

8. The device will restart.

Connect to Wi-Fi networks

Turn on Wi-Fi & connect to a network

1. In your device’s  Settings menu, touch Wireless & networks > Wi-Fi.

   • Devices running Android 4.3 or lower have a different  Settings icon.
2. If Wi-Fi isn’t already on, slide the Wi-Fi switch to the On position.
3. The device scans for Wi-Fi networks. To connect, touch a network name.
   • Secured networks display a Lock icon and may ask for security details.
   • Your device will remember the network, along with security details, and connect automatically when in range.
   • To change network settings, touch & hold the network name.

Trouble connecting to Wi-Fi

If you can’t connect to Wi-Fi, try the following steps:

• Turn off your device, then turn it back on.
• Unplug your modem and/or router for 15 seconds.
• Remove your Wi-Fi network (instructions below), then add your Wi-Fi network again.
• Make sure you’re using the correct network password.
• Make sure that your router's security settings are set up properly.
• Confirm that your router's firmware (software used by the router) is up-to-date by following the manufacturer's instructions.
• Check your Wi-Fi connection at another location, like a friend’s house. If you can access Wi-Fi there, the problem might be specific to your original location, not your device.
If you still can't connect, contact, your internet service provider. You can also ask the Nexus Community or contactGoogle Play Support.

Advanced Wi-Fi settings

Configure Proxy Settings
For each Wi-Fi network you add, you can connect via a proxy.
1. In your device’s  Settings menu, touch Wireless & networks > Wi-Fi.

   • Devices running Android 4.3 or lower have a different  Settings icon.
2. Touch & hold a Wi-Fi network in the list of networks.
3. Touch Modify network.
4. Select Show advanced options. (You may have to lower the keyboard first. To do so, touch the  back button.)
5. Touch None under Proxy Settings, then touch Manual in the menu that opens.
6. Enter the proxy settings.
7. Touch Save.
Proxy settings for each Wi-Fi network must be set up separately.
Edit advanced Options(Sleep,Scanning,Poor Connections,Frequency Band,Optimization)
Edit advanced Wi-Fi settings:

1. In your device’s  Settings menu, touch Wireless & networks > Wi-Fi.

   • Devices running Android 4.3 or lower have a different  Settings icon.
2. In the Wi-Fi settings screen, touch  Menu > Advanced.
3. Touch one of the setting options below.

Network notification

• Touch to a receive notification in the Status bar when your device finds a Wi-Fi network.

Keep Wi-Fi on during sleep

• Choose how your device handles Wi-Fi when it is asleep.
• You can keep Wi-Fi on, keep Wi-Fi on only if your device is charging, or turn Wi-Fi off.
• If you turn Wi-Fi off, you may increase your mobile data usage.

Always allow scanning

• Check the box to improve location services and scan for Wi-Fi networks even when Wi-Fi is off.
• Wi-Fi scanning is primarily used to improve location services even when Wi-Fi is off.

Avoid poor connections

• Check the box to automatically avoid using networks with a low-quality or unreliable Internet connection.

Wi-Fi frequency band

• Touch to specify the frequency range of operation.

Wi-Fi optimization

• Check the box to minimize battery usage when Wi-Fi is on.

Wi-Fi networks

Add a hidden WiFi Network
You can add a Wi-Fi network that does not broadcast its name (SSID) or is out of range.
1. In your device’s  Settings menu, touch Wireless & networks > Wi-Fi.

   • Devices running Android 4.3 or lower have a different  Settings icon.
2. Slide the Wi-Fi switch to the On position.
3. Touch the  Plus icon.
4. Enter the network name (SSID) and other security details, if needed.
5. Touch Save.
Your device will connect to this network automatically the next time you are in range.
Remove a WiFi Network 
You can forget a saved Wi-Fi network if you don't want your device to connect automatically.
1. In your device’s  Settings menu, touch Wireless & networks > Wi-Fi.

   • Devices running Android 4.3 or lower have a different  Settings icon.
2. Slide the Wi-Fi switch to the On position.
3. In the Wi-Fi settings screen, touch the name of the network.
4. Touch Forget.