Canada's fourth largest cellco Freedom Mobile, a subsidiary of Shaw Communications, last week expanded the availability of VoLTE services to additional smartphones including the Samsung Galaxy S9/S9+ and the LG V30/Q6/Q Stylo+/X Power 3, having initially launched VoLTE in mid-August (supported by LG G6/G7 phones, and Samsung Galaxy S8/S8 Plus/A8 devices later that month). iphoneincanada.ca reports that Freedom Mobile's Apple iPhone users are still waiting for VoLTE support, although this is expected 'in the next couple of weeks'.
Shaw previously indicated that its recent 700MHz/2500MHz network upgrades have improved network quality and enabled additional features including VoLTE (having earlier launched Wi-Fi Calling, in April 2017).
Thanks to TeleGeography for the article.