Why is it best to store a telephone number as a string vs. integer?

Question

As the question states, why is it considered best practice to store telephone numbers as strings rather than integers in the telephone_number column?

Not sure I understa

Answer 1

Consider these phone numbers for example

099-1234-56789 or +91-8907-687665.

In this case,if the phone_number attribute is of type integer,then it can't accept these values.It should be a string to hold these type of values.So string is always preferred than integer