i m new user and i have strange chine android need to unlock network lock

Hi team after reading many post i come to know u r the best team for chines phone, and i bought miracle box.i have phone name is vido model A509 its network lock when we put sim card it saying hone is lock with different provider. i connect with adb but problem is on miracle box software on android tab there no sim unlock or network unlock option? how do i unlock this phone?