If I didn't text/email/etc. and ask you to call me, or we didn't somehow otherwise arrange it in advance, that's "unsolicited" to me. Just being a friend/family member doesn't change that underlying premise. The difference is, if you fall into those categories I might pick up anyway, depending on what I'm doing / how I feel.
> How would your dad, and the others mentioned, be considered 'unsolicited '