May be worth having a read up https://aboutsignal.com/blog/how-to-switch-from-whatsapp-to-signal/

Also there is watomatic.app which can automatically respond to a message saying you are on Signal.

Had a client who wanted me to setup a geekom mini PC. Very good and reliable. Easy to unscrew and upgrade if needed. Had a crucial memory module and samsung ssd.

This is why you should use Signal.

At least there is message requests so you report and block if needed

Looks like a palm pre.

Where did you get the keyboard case from?

I can hear that track