Blu Studio 5.5 basebands
While these have been made with studio 5.5 in mind they can still be used with other phones. The modem.img should work on any phone with MOLY.WR8.W1248.MD.WG.MP.V6 but the installer will only work if your data is mounted on mmcblk0p5.
Install from cwm
...or extract and copy/paste and set permissions manually
(this one seems a little old anyone have a newer version please share it)
1900/2100 I think (D610i)