fp.

I had ChatGPT explain why this is works as a unlimited hotpot. Very cool: "It works because carriers detect tethering partly by looking at TTL values. Android subtracts 1 from TTL when hotspot/tethering packets are forwarded, so the carrier sees a different TTL and knows the traffic came from a tethered device. Your eBPF program increments the TTL back by +1, hiding the fact that the packet was forwarded through your phone. So to the carrier, the traffic looks like it originated directly from the phone, not from a tethered device. That defeats one of the carrier’s tethering-detection methods."

Gave4655•1h ago

in normal you would do use this trick. but however new phones does not include the kernel module that helps you to modify the TTL using iptables

        iptables -t mangle -A PREROUTING -i "$INTERFACE" -j TTL --ttl-inc 1

        iptables -t mangle -I POSTROUTING -o "$INTERFACE" -j TTL --ttl-inc 1