[Q] Nvram error and IMEI error topic

Whenever i flash a new rom my wifi shows Nvram error and my IMEI gets erased and my bluetooth address becomes 00:00:00:00:00. So am not able to transfer files via bluetooth. I have a backup of my IMEI so thats not a problem. But the Wifi and the bluetooth have been a problem for me. I tried flashing stock rom via SP flash tools too. But that too didn't work for me. I saw some tutorials but most of the files have been deleted on them so i am not successful on doing them. Kindly anyone help me please. My mail address is demongokul@gmail.com