I pretty much only have a phone because my mom hated worrying about me. She doesn’t call me even now but it made her feel better.
On the other end of the spectrum, having a pocket sized device which gets internet has proven to be a life saver for me. I’ve gotten the internet equivalent of odd glances for bringing up practical aspects of my social anxiety on BBS before but …
Most sensible people will leave you alone if it looks like you’re doing something. Whereas the “headphone code” doesn’t really seem to work on some people (the headphone code says “if I have headphones on (or earbuds in, whatever) don’t talk to me unless I’m on fire.”).