/// <summary>
        /// Phone number needs to be in format 447001002003
        /// </summary>
        public bool IsValidMobileNumber(string number)
        {
            if (number.StartsWith("+"))
            {
                return(false);
            }
            if (number.StartsWith("00"))
            {
                return(false);
            }
            var phoneNumber = BuildPhoneNumber(number);

            if (phoneNumber == null)
            {
                return(false);
            }
            return(_util.IsPossibleNumberForType(phoneNumber, PhoneNumberType.MOBILE));
        }