Thank you for clarifying the difference between WiFi calling and VoLTE. I understand that VoLTE can be used on a Samsung S7 on some cell networks but not on Virgin Mobiles. On reading the Virgin Media list of devices that are supported for VoLTE it suggests that others may be added in future. I take it from your reply that you think it highly unlikely that the S7 might be included in future?
You might get VoLTE when you are moved to Vodafone as they allowing it on Virgin and are at present rolling it out to their Voxi PAYG brand. It's part of their push to close 3G announced 18 months ago.
Certainly won't get it while you are on EE who keep stuff to themselves
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