Wireless Home Phone ZTE723CA signal issue

Hi all, 

If anyone has similar issues - what I've done is ordered a new service line which comes with the exact same ZTE WF723. Same price @ $10/month. 

This new line one works using VoLTE, and doesn't go orange and drop to 3G on calls.

To test, I swapped the SIM's between the two ZTE WF723's - and voilà - the new SIM is properly provisioned for VoLTE and works using the LTE network on both ZTE723 devices. Fancy that?

I had reached out to TELUS Support and none of them seemed to know what was going on and kept suggesting I get something called the "Wisha" which I could not find on their website.

I'm porting the number out of the original device to another carrier, and then I'll port back in onto the new line I just took out to keep my number.

Bit of a workaround - but if it works for what I wanted - hey it works.