those who are facing problem of wifi and bluetooth not work after hard reset try this solution tested by me . inconstant solution no need to detach battery for 24 hours

1. Make full backup of faulty phone (in factory format) using volcano box (no problem if wifi or bluetooth not work )

2. open flashtool v3.1312.0.139

3. first format ur phone with flashtool ( ur phone may can dead but no worry)

4. after that select scatter file and click firmware > upgrade and it will show a mesasge like this



5. select files as given ****






after flash complete check ur phone it works and wifi and bluetooth works again