Spoofing MAC Address on Micromax Juice 3

I am a Micromax Juice 3 user, I have rooted my phone using the KingoRoot App. Then I have installed the xposed installer to use various modules for android. Now I want the ability to spoof my mac address, I have tried multiple ways as suggested in some previous questions like installing terminal emulator and using commands like busybox ifconfig eth0/wlan0 hw ether XX:XX:XX:XX:XX:XX or iplink set eth0/wlan0 address XX:XX:XX:XX:XX:XX But it gives me an error : "operation not supported" I have tried using apps to do it, like Pry-fi or Mac Changer but they also do not seem to work. For eg. in Pry-fi I always see my current and original address as the same. I have unlocked my bootloader (if that's a pre-requisite -I am not sure) using fastboot oem unlock command which wiped my device which makes me believe that unlocking was successful. Anybody has any ideas how can I successfully make it work?