how to replace imei,WiFi address and BT address (how to use SN WRITER)

every now and then while experimenting new roms one either brick his phone or loses all their secure files like nvram and etc
either way you have lost your imei which is the sole reason that you can use your sim
well if you find yourself in this situation and have a phone with a mediatek processor then don't worry i got you
so all you need is your firmware,sp flash tools,SN writer and of course drivers
so what you need to do is install your drivers (cdc is a tough one you can find other posts in xda itself for installing it)
then just for heck of it because you cant be sure that you have the same firmware as the one you downloaded use sp flash tools
to flash the firmware (use firmware upgrade option or format+download option i prefer the latter)after you are done flashing
open SN writer and go to settings and choose your ap_db and md1_db now the trick to this is if you have two apdb and md1db then you have to find out which one is the correct by trail and error if not,you lucky dawg if nothing else works turn on auto gen option
in identify and keep on trying till your phone gives up and trust me it will give up
p.s i am new at this so like go easy on me
p.s p.s i will upload some pictures in the near future