SOLUCIONADO!!
Por si a alguien le sirve de algo comparto la solución que encontró el usuario xuleu de xda
I always wanted to change the Mac address, but finally I found how to change it, and this is very simple !
Step 1: Download ES File Explorer, obtain root privileges.
After entering ES File Explorer, go to /Device/System and go to Options, switch ON the setting for Root Explorer for read-write mode.
Step 2: Close WIFI
Step 3: Go to / system / etc / firmware / wlan / prima /.
There will be three files, find "WCNCC_qcom_cfg.ini"
Open the file with ES Note Editor,
Inside the file check for these 3 lines:
Intf0MacAddress = 986CF563ECDB
Intf1MacAddress = 986CF563ECDB
Intf2MacAddress = 986CF563ECDB
This is the Mac address, each person should be different,
Change into anything, but remember, three Mac address should be changed to the same
Intf0MacAddress = 001122334455
Intf1MacAddress = 001122334455
Intf2MacAddress = 001122334455
Step 4: After changing the MAC, remember to save.
Probado y funciona, la nueva mac se mantiene después de reiniciar el terminal.