Telus and Bell have separately shared plans to shut down 3G service in parts of Manitoba, which suggests a full Canada-wide shutdown is coming. You also need to be aware that LTE support doesn't necessarily mean VoLTE support. OnePlus phones had issues with Rogers' 3G shutdown. You can learn everything about Telus's 3G shutdown on its support page. The CRTC has a fact sheet regarding the 3G shutdown on its website.