Question: Can you add to the table the name of the phones associated with each of the phone ids?
SQL: SELECT t2.market_id, t2.district,t1.phone_id,t3.name FROM phone_market AS T1 JOIN market AS T2 ON T1.Market_ID   =   T2.Market_ID JOIN phone AS T3 ON T1.Phone_ID   =   T3.Phone_ID