For
Apple Users
	- 
Check to
	make sure your Airplane Mode is turned off. If it already is off,
	turn it on, wait 5 seconds, and turn it off.
	 - 
Make sure
	your DO NOT DISTURB settings are turned off. You can easily see if
	this feature is on by checking for a half moon on the top right
	corner of your display near your battery symbol. To confirm it is
	off, go to Settings> turn off DO NOT DISTURB.
	 - 
Check for
	blocked phone numbers by going to Settings> Phone> Call
	Blocking & Identification.
	 - 
Check to
	see if Call Forwarding is turned on by going to Settings> Phone>>
	Call Forwarding and confirm it is turned off.
 
If
these issues still do not resolve the issue…
	- 
Check for
	a carrier settings update. Just like our tech gadgets have regular
	system updates, carriers will also update their towers for
	improvements to make sure we get proper cell phone reception and
	avoid dropped or missed calls. (Settings>General>About. There
	will be an options available directly from the phone to update with
	the carrier)
	 - 
Make sure
	your iPhone is up to date with the latest software. Issues with
	calls can be with simply not updating your device. Those updates are
	made to fix glitches that occur. (Settings>General>Software
	Update).
	 - 
Check your
	SIM card. If you have a SIM card, remove it and reinsert it. There
	may an issue with the SIM card (dirty or damaged, corrosion) and it
	needs to be replaced. 
	
	 - 
Call the
	carrier to verify there is no issue with the SIM card. 
	
	
		- 
		Contact carrier to verify your account is set up to use the iPhone
		
 - 
		Contact carrier to verify that there are no service outages in your
		area.
		
 - 
		Contact carrier to verify that there are no billing related issues.
		
 - 
		Again, verify that your calls do not have errors within the
		carriers system.
 
 
	- 
Reset
	Networking Settings in your phone (settings>general>reset>reset
	network settings). Your data will not be erased but you will need to
	save your wifi /cellular settings, including saved networks (home or
	work) and VPN settings.
 
For
Samsung Users
	- 
Try
	calling a different contact in your phone to check to see if it is
	just an issue with one contact.
	 - 
Check your
	SIM card. If you have a SIM card, remove it for 1 minute and
	reinsert it. There may an issue with the SIM card (dirty or damaged,
	corrosion) and it needs to be replaced. 
	
	 - 
Call the
	carrier to verify there is no issue with the SIM card. 
	
	
		- 
		Contact carrier to verify that there are no service outages in your
		area.
		
 - 
		Contact carrier to verify that there are no billing related issues.
		
 - 
		Again, verify that your calls do not have errors within the
		carriers system for phone calls.
	
 
 
	- 
Verify and
	make sure that the number is not on the Auto Reject List
	 - 
Power on
	the device in Safe Mode to see if the issue persists.
	 - 
Disable
	and remove applications that have features to block and reject
	calls.
	 - 
Make sure
	Flight Mode is disabled.
	 - 
Perform a
	Factory Reset
	 - 
If issue
	persists, contact carrier.