Why is a + needed for a phone number? What does it mean and why can’t it be omitted if the full number follows after anyway?

Question

Why is a + needed for a phone number? What does it mean and why can’t it be omitted if the full number follows after anyway?

In: Other

Answer 1

Its to indicate that the next few digit show the country code. And it can be replaced with 00

In some places at least you don’t need it if your call is within the country