@howie13 

Hello Howie13,

I live in the UK, but, if you head over to this page (AU based) https://www.tp-link.com/au/support/download/archer-vr2100/ , click on the "Emulators" button and then click on "Browse" below it. This will open up a visual representation of what the router's web console page will look like, in a new tab. The web console page always opens up on the "Basic" tab. Click on "Internet" from the left-hand menu. The top two options refer to Vlan Tag. This is required to let your router know how to connect to your service provider's infrastructure.

I'm presuming you can switch providers once you're out of contract. Assuming you can, they all use the same physical pipe into your property; the way they differentiate themselves from one another is via this tag, followed by the username and password you set when you joined them.

I think the above is what you're looking for. I hope it helps you!

Mike