Post [Q] Help for unlocking Sony Xperia m c1904

IMEI software version 06
Rooting Status:
Bootloader unlock allowed : NO

Sim lock
[0] network 10[*] network subset 0[*]service provider 0[*]corporate 0[*]sim 0

Android version 4.1.2
Kernel version 3.4.0
This phone is lock to virgin mobile in Canada.
Please give me a clear guide to unlock it.
Let me know if you need more information.