Sorry, but there's no complete list or IMEI checker than can be used. Telus does have an IMEI checker but it sometimes will state that a phone is compatible with VoLTE at Telus but it doesn't work end up working on VoLTE at Public Mobile. As for the list that Public Mobile provides, it isn't complete. If the IMEI of your devices isn't on Public Mobile's allowed list for VoLTE, it won't work for that. Public Mobile actively blocks some VoLTE devices from using VoLTE.