+-------------+-------------+-------------+
| TELEFONO_ID | PRODUCTO_ID | IMEI |
+-------------+-------------+-------------+
| 1 | 1 | 12345 |
| 2 | 1 | 12348 |
| 3 | 2 | 12346,12347 |
| 4 | 2 | 12349,12344 |
+-------------+-------------+-------------+