On MacOS this will do it:

printf 'net.inet.ip.ttl=65\nnet.inet6.ip6.hlim=65\n' | sudo tee /etc/sysctl.conf

Can’t personally speak for other OSes at present. Here’s a SO post about Ubuntu: https://askubuntu.com/a/670276

You can also just increase your laptop’s initial TTL by one and then they can’t tell.

I’m a nerd. I know vaguely what RCS is because I had a discussion in 2019 with a friend about it. Do I have it? Do I use it? I have no idea. Is it an app or just a protocol that happens behind the scenes? I would assume the latter. My phone’s a few years old, isn’t everyone’s? Probably that means I don’t have it. No way to tell and I’m not going to bother trying to find out.

I’m so much more technical than most people btw

Maybe in modern media. He’s definitely not portrayed as an equal or opposite to God in the bible. He’s just another angel