Troubleshooting for Nokia Asha 311

1. Switch Bluetooth off when you do not need it.
2. If you have switched Mobile data connection to Always on in connection settings and there is no mobile data coverage, your phone periodically tries to establish a mobile data connection: Select Mobile data connection > When needed.
3. If the signal strength of the cellular network varies in your area, your phone must scan for the available network repeatedly, which increases demand on battery power.  If Network mode is set to dual mode in network settings, your phone searches for the 3G network: Select Settings > Phone > Network mode > GSM.
4. Change the time-out period after which the backlight is switched off in screen settings, and adjusting the light sensor that adjusts the screen brightness.
5. Switch off the vibrate function.
6. Do not use animated pictures or videos for your phone background.
7. Switch off your phone whenever you do not plan to answer any calls, for example, while you are sleeping.
8. Make sure your phone is running the latest software. See more information on updating your phone software.

If the battery keeps draining fast, the battery may be wearing out and require replacing. 

These simple steps can help in a majority of cases.

Restart your phone

For phones with removable battery:
1. Switch your phone off
2. Remove the battery.
3. After a few seconds, put the battery in and switch your phone on.

For phones with non-removable battery:
1. Press and hold the power button until the phone vibrates and switches off.
2. Switch your phone on again.

Reset the settings

Restore the original factory settings as instructed in your phone's user guide.

Update the software

Make sure your phone is running the latest software. For downloads and assistance, go to your local Nokia website's support page.

To restart a device having integrated battery (e.g. Nokia N8-00, E7-00, N9, Lumia 800), press and hold the power key for about 8-10 seconds until the device switches off. Then you can switch your device on again normally.

If there is no response when tapping the touch screen, check the following:

1. Check that the device is not locked. When the device is locked, you must use the lock switch to unlock and wake up the screen.
2. If the device is not locked but only the display light time-out has expired and the display has dimmed (a situation which may occur if Keypad autolock feature has been disabled), the touch screen can be woken up by pressing any mechanical keys like menu key, volume keys, camera key or the lock key (lock key needs to be pressed twice because the first press of the key will lock the device).
3. If in a phone call, check that the proximity detector at the upper front corner of the device is not covered. The proximity sensor will lock the touch screen to avoid unintended touch screen actions during a phone call when placing the device next to your ear. Check that the proximity detector is not covered if trying to use the touch screen while a phone call is active. 
4. Remove the battery and reboot the phone.
5. If there is a memory card in the phone, try booting up without the memory card.
6. If your phone supports touch screen calibration, try to re-calibrate the touch screen (select Settings > Phone > Touch input > Touch screen calibration).
   

If the touch screen doesn't yet respond, try restoring the factory settings. If you cannot access the factory settings menu via the touch screen (Settings > Phone > Phone mgmt. > Factory settings), try entering the following reset commands via the keyboard. Before resetting the device, take a backup of your phone via Nokia Suite.

• *#7780# (try this first, it will do a soft reset).
  
• *#7370# (try this if the above command doesn't help, this command will do a hard reset).
  

If the touch screen is not yet working properly, take the phone to Nokia care point for inspection.