I would suggest a varchar for the phone number (since phone numbers are known to have leading 0s which are important to keep) and having the phone number in two fields: Country Code and phone number i.e. for 004477789787 you could store CountryCode=44 and phone number=77789787. however it could be very application specific.
The two-letter ISO country code of the payment source owner's billing address is invalid. country_phone_code_invalid. The international country calling code is invalid. country_phone_code_length_invalid. The international country calling code length is invalid. currency_invalid. The three-letter ISO currency code is invalid. currency_required
Mobile Country Code(CC) is 1 to 3 digits long.CC Indicates the country to which the number belongs. When a mobile subscriber dials a local mobile phone number, the country code should be omitted. A zero may be substituted for the country code. For dialing outside of the country, the national format is used.

32. Store them as two fields for phone numbers - a "number" and a "mask" as TinyText types which do not need more than 255 items. Before we store the files we parse the phone number to get the formatting that has been used and that creates the mask, we then store the number a digits only e.g. Input: (0123) 456 7890.

The accepted answer doesn't work with numbers without '+' sign. And I did a little math following the Wikipedia metrics, Country Code : 1 to 3 digits, maximum : 15, Actual Phone Number : 12 (upon 15-3) to 14 (15-1) digits. The minimum in this regard is 10. For instance, the dummy US number "+14155552671" is the bare minimum. . 371 34 401 263 223 391 261 79

max phone number length with country code