How to change(spoof) MAC address forever on rooted android phone

[AC Question]

As title says, I want to change MAC address on rooted phone, but to be forever. I have already changed it with some apps from google play(MacChanger, Change My MAC-Spoof Wifi MAC, Mac Spoofer...). In one moment with some of those apps(I'm not sure with which one), I accidentally changed MAC address forever, no for temporarily and I don't know how it selfs changed to be my address forever. So now when I restart phone, it's shows same MAC address that it isn't my real phone MAC address. I tryed with all that same apps to turn back my real address, but without success, they just change MAC for temporarily. I have copy in clipboard my real old phone MAC address, so no problem for finding my real address. Any solution or idea please?
Sry for my bad english