SELECT DISTINCT
                m.id,
                concat(m.manufacturer,' ',m.model) as name
              FROM
                mobiles as m,
                handsets_datafiletypes as h,
                datafiletypes as d
              WHERE
                h.handset_id = m.id
              AND
                h.datafiletype_id = d.id
              AND
                d.subtype_id = ''
              AND
                h.datafiletype_id IN ()
              ORDER BY
                name


You have an error in your SQL syntax; check the manual
that corresponds to your MySQL server version for the right syntax to use
near ')
              ORDER BY
                name' at line 15