Write SQL query to solve given problem: Please provide the age group of any LG Nexus 4 device users.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.`group` FROM gender_age AS T1 INNER JOIN phone_brand_device_model2 AS T2 ON T1.device_id = T2.device_id WHERE T2.phone_brand = 'LG' AND T2.device_model = 'Nexus 4'