Find the name of the company that has the least number of phone models. List the company name and the number of phone model produced by that company.
SELECT Company_name ,  count(*) FROM phone GROUP BY Company_name ORDER BY count(*) ASC LIMIT 1;
least number of phone models refers to MIN(COUNT(phone_model)); company name refers to Company_name; number of phone model produced by the company refers to COUNT(phone_model);