Originally Posted by sobri46
Do you mean I should flash tw rom first ?
Then call ##72786# and the phone will work fine as before
Can I flash tw rom because my stock rom is 4.3 ?
And I hear that if we have 4.3 rom we cannot downgrade to anyrom
Yes, you need to be running any TW based ROM (stock, Wicked Sensations, MOAR, etc.) to run a PRL and Profile reset from your dialer, this function does not work on AOSP based ROM's. Hopefully you have a backup of your stock ROM, otherwise you will need to download one, and be patient because the file size is huge.
As to the second part of your post, stock is TW, and the downgrade rumor is only applicable if you 1) Have the Knox bootloader and 2) try to use Odin to change to a different firmware version that contains a non-Knox bootloader. You can flash any Android version of any ROM that you want when using custom recovery like Philz Touch.