That's another area of Vodafone's documentation that could be improved to avoid users getting wound up.
http://support.vodafone.co.uk/Network-and-coverage/Wi-Fi-Calling/67269365/How-do-I-set-up-Wi-Fi-Call...
Step 4 ought to start with:
"After you have received a text that confirms wifi calling is now active..."
Because until you get that second text the Wifi Calling menu item will not be visible.
It's also worth pointing out that if you send the 'Calling' text too soon after SIM activation the first reply will come back but the service will never be activated. That's what happened to me. I sent the text, got the first reply then spent several hours swearing at Vodafone and wondering if I ought to give up and send the phone back. It was only in desperation that I sent the text again and within five minutes got the second response telling me wifi calling was active.
Frankly every time I have dealing with Vodafone it ends up like this. Poor documentation and frustration.
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