I've read the thread, quite a journey. Seems like the easiest way to get the token is to text Daniha.From the attachment you didnt miss anything
Reboot again your phone and then go check the ims status on
Settings-->About Device-->Status-->Sim card status
And there check "IMS Registration state"
Does it says registered or not registered ... If it says registered then your volte is working no matter that the icon doesnt show up on the status bar
Bit if it says not register then unfortunately volte is not working because you need addional steps with PDC to change the mbn profile but you need to have acces to engineering mode.. which at the moment unfortunately there is no a free way for getting the token for engineering mode
Read through this post to get an idea for the engineering mode
GTool_Pro also is still cant be used right