How to consolidate cannot be completed messages

1. What does it mean when it says the number Cannot be completed as dialed?
2. Why can my call not be completed?

What does it mean when it says the number Cannot be completed as dialed?

This message can have several reasons (listed in most common order): The number being called has the wrong format (missing number, etc.). The number is not known / number is no longer in use. The number cannot be reached (out of reach of network or switched off phone).

Why can my call not be completed?

The phone network sometimes gets overloaded, which results in messages like this or fast busy. It could be a problem anywhere along the path from your phone to the callee's phone. For example, your dermatologists phone provider might have had issues or their phone system might have been down.