VoLTE Support using Samsung Galaxy Z Flip 3

[Marmalade]

I have a Samsung Galaxy Z Flip 3 with the VoLTE option enabled. Do i need to do anything to enable it on Smarty's website or app for my account? The phone is apparently on Smarty's supported list for VoLTE. 

[MSF]

@Marmalade  There is no special setting required other than VoLTE being enabled.

The issue remains that some phones although VoLTE enabled are not compatible with Smarty's specific protocol.