..::Boot-loade unlock Model : A3_UL::..

Hi!
Can any help’ How To Unlock Boot-loader Model : A3_UL

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Model : A3_UL
IMEI : 356821051470317
Build : 1.31.401.2
CID : HTC__002
HBoot : 3.18.0.0000
MID : 0P9O20000
Security : ON
Region : Unknown
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we want flash by ******* file……:rolleyes: