Write SQL query to solve given problem: What is the brand of the device used by the most users in the M23-26 user group?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T.phone_brand FROM ( SELECT T2.phone_brand, COUNT(T1.device_id) AS num FROM gender_age AS T1 INNER JOIN phone_brand_device_model2 AS T2 ON T1.device_id = T2.device_id WHERE T1.`group` = 'M23-26' GROUP BY T2.phone_brand ) AS T ORDER BY T.num DESC LIMIT 1