Remember That It Might Not Be Your Fault

To make a phone call, both phones need to work properly. If you’ve already gone through all the troubleshooting tips you can find and still can’t reach the other person, maybe it’s not your fault.
It’s possible that the other person is in a place where they can’t receive phone calls. Or maybe they have their phone turned off. If possible, try calling the other person from another phone or contacting them in another way. Or, you can try calling someone else to see if you’re the one with the problem or not.