TTL Mangeling basically dead?

So now in 2025 is there any way left to avoid using my cellular plan’s hotspot data on any of these routers? Or basically all options are gone now.

Hi

I believe you’re using tethering rather than a cellular router?

Essentially yes—Android and iOS create separate APN Context for tethering/hotspot, which are counted toward hotspot data usage.

Even with a cellular router, it can still be difficult to bypass certain carriers’ strict policies.
Some carriers also use DPI to detect whether traffic originates from multiple devices.