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Microsoft Lumia 950 Troubleshooter Calling and Contacts
h3. Do you need help configuring your telephone services settings?
* You can configure a variety of phone-related settings to your own preference. To do this, scroll right from the Start screen. Choose *Telephone*, choose the options symbol and choose *Settings*.
h3. Do you need help configuring your contacts settings?
* You can configure a variety of contact-related settings to your own preference. To do this, scroll right from the Start screen. Choose *Contacts*, choose the options symbol and choose *Settings*.
h3. Have you rebooted the device?
* Many problems can be solved by simply rebooting the device.
* Turn your Microsoft Lumia 950 off, reboot it and check whether the problem has been solved.
* If you cannot reboot the device the normal way, you can also force it. To do this, hold down the power and the volume down button simultaneously until the screen goes black.
h3. Are you experiencing problems making and receiving calls?
* If you are experiencing problems making or receiving calls, there may be a problem with the network coverage. This is probably due to your location, for example a garage or concrete building. Test to see if a change of location helps.
* If this fails, check the network coverage in your area.
Link: Coverage map
h3. Are you experiencing network coverage problems?
* If your device fails to connect to the BASE network automatically, we recommend you try it manually.
* *Let op:* Your device should connect to the network BASE automatically. If the manual mode works but the automatic mode does not, please contact customer service.
Manual: Manually select a network
h3. Did you install the most recent device software?
* Your problem may be resolved through a software update. Check if a new version of your software is available.
Manual: Software update
h3. Have you tried a factory reset?
* If the preceding steps have not resolved your problem, try doing a so-called 'factory reset'.
* *Let op:* A factory reset involves deleting all personal data on the device, such as photos and messages. We recommend you create a backup before trying this.
* See the below instructions.
Manual: Restore factory settings