How to fix Oppo Wifi , Hotspot and Bluetooth problems

I have oppo A33F (Neo 7) . I am use this phone from 1 year. One day suddenly his software curupt
 And Mobile was not getting started. then i do new Software And mobile started. After Softwrare
my wifi , Hotspot and Bluetooth is not working.my mac address showing unavailable.then i see 1 trick and i follow his steps and succes.

Follow these Steps

Step 1 

First Root your Mobile

Download root app for oppo

Step 2

Download file for replace

Click here to download 

Step 3 

Install es file explorer from play store

Click menu option

Open es explorer and on root explorer option

After all setting Open es explorer and copy file Where you have Save

and click menu option and select local and then select device

Now select Location ” System/etc/firmware/wlan/prima ” and paste file 

After replace DO NOT Restart your mobile and first turn on Bluetooth