/// <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)); }