Forum Discussion
Nintendo Online cannot play with other T-Mobile subscribers
I was a Spectrum customer for 2 years and play Mario Party online with my friends, one of whom is a T-Mobile subscriber. I switched to T-Mobile internet on 12/29/23 and now we cannot play any Nintend...
From what I've read about the features exposed on the TMo modems, the ability to enable bridge-mode is disabled/obscured. The next best-bet is to enable a DMZ on the same router, and put your secondary router in the DMZ.
Regardless, you're behind a CG-NAT (Carrier Grade NAT), so most IPv4 (port) forwards are going to fail given that you're sharing public IPs with other customers (this is sort of the definition of CG-NAT, or at least part of it). The only (maybe) workaround is to use IPv6 explicit forwarding, assuming your router supports this, and you have the requisite experience to set these up (significantly trickier than v4 forwards, even with core v6 knowledge, IMO/IME), and knowledge of the v6 targets on the other side…
If you want to have a persistent public IP, the business service is the only option I’m aware of, where you’ll get a static assignment of an address or pool of addresses (depending on plan).
