- Only Three offers a fixed IP was far as I'm aware. Everyone else (even Three's virtual networks/MVNOs) uses CGNAT. Some (EE) give you an IPV6, but V4 is CGNAT.- Some EE MVNOs don't have access to every band. Plusnet, RWG, Lyca, etc, don't have access to band 20. Not that it helps a lot with speeds, but that's all that you get in some areas.
I found on SMARTY you can still use the 3internet APN and get a public IP address.Nope I was wrong, it IS CG-NAT, I always get confused by the fact the mobile networks don't use the official CGNAT range.
I read that Smarty doesn't care what you put for APN, could be anything. I can't remember if I tested that idea.