List the phone brands and models of the users under 10 years of age.
models refers to device_model; under 10 years of age refers to age < 10;
SELECT T2.phone_brand, T2.device_model FROM gender_age AS T1 INNER JOIN phone_brand_device_model2 AS T2 ON T1.device_id = T2.device_id WHERE T1.age < 10