lenovo y50-70 mod 20378-80EJ remove wireless white list

hi i have a lenovo Y50-70 mod 20378-80EJ 

bios ver. 9ECN43WW(V3.03)

https://download.lenovo.com/consumer/mob...cn43ww.exe

i'm a newbie from this forum, i've read a lot and it's seems i need to downgrade my bios for whitelist removal

sorry if i wrong how to post this request, but it'll be very apreciated if you can help me i'll donate as well for you hard work 

please let this pc free from rtl8723be  ty.