[Meet Thaker]

hi there,

i'm using lumia 640 LTE Vodafone NZ and latest mobile build is 10586.494.

So, my phone doesn't detect the missed calls - I don't have any notification for missed calls or SMS. There is nowhere earphone icon notification - on lock screen, glance screen and desktop screen. The only way to check if I have missed calls is to check the list of all my calls. The strange thing is that only after this check when I go back to the desktop screen, earphone icon appears to show me that i have missed calls (if any). Then missed call earphone icon appears on lock and glance screens also - it is not correct also because I already saw the missed calls. Missed call earphone icon disappears from everywhere only if I check again (for second time) the list of all my calls.

When I used Windows version 8.1 I didn't have any issues with the missed calls notifications.

So, my question is why does it happen and what I have to do to fix this issue?

[ven07]

Check under notification options (settings) if the phone app is set to give notifications. Maybe it was turned off by accident. Otherwise you can try these options:

Soft Reset

The soft reset is the same thing as pulling your battery (on devices where that is possible). This method will not remove anything at all from your phone and is completely safe to attempt in any problem situation.
You perform the soft reset by having your phone turned on. Then press and hold the volume down + power buttons until your phone vibrates and restarts. Note that you should not touch the device screen during the process (not even when the 'slide down to power off' prompt appears).

Hard Reset

The hard reset will bring your phone back to factory settings, the same state as when the device was first turned on. All apps, messages, media, personal settings, etc will be removed from the phone. If backup is turned on under Settings, you can restore your apps and settings after performing a hard reset (as long as you initialize the phone with the same Microsoft Account). Note that resetting your device will not remove any OS or firmware updates. You will remain on the same version of Windows Phone after the reset.
If you can TURN ON your device you can reset your phone under Settings: Settings > about > reset your phone

If you can't open your device because of a forgotten PIN (or similar), you can use the button method: Press and hold the power-, volume-down- and camera buttons until the phone vibrates. Then release the power-button and keep the other two buttons pressed for another five seconds. The phone should reset to factory settings.

If both of these options failed there is one more alternative. Use the Windows Device Recovery Tool to reset your device. This will take you back to the OS version which originally came with the phone. So for phones that did not ship with W10M, the WDRT will take it back to 8.0. If the phone was shipped with W10M, the tool will take it back to a version of W10M

Follow this link for instructions and download: http://www.microsoft.com/en-us/mobile/support/faq/?action=singleTopic&topic=FA142987