yes you can unlock for free well no unlock but
you´ll can use sim for other company

only apply this patch

;W800 SW-R1BC002
;Remove SP-Lock
;(с)IronMaster
;(p)Adrian. Top Sony Team
+44020000
b51224: 70B5041C23F2D2F800230022011C1C20 F0B505213A22D1F7EFFE0020F0BDC046
the only that you need is to have the R1BC002 firmware in your phone