I think the patched version will be OK too... it is the same as M55 except different read/write regions.
@ednacell
Nice posting- thank you very much!!
@fuzionGSM
It's like C60/C61. Take an x-acto and cut gently along the yellow line (nothing visible to cut on board). Test if bootfile is accepted. If not, cut more. Repeat until unlocked. If you cut too deep you can damage the phone so I recommend this slow method, at least until you're really comfortable with it.