@froztbyte exactly. I resisted for years using WhatsApp because it wouldn’t even run without full access to your address book (this has now changed). I mean, I have client contacts on my phone, I (and they) don’t want to share them with a random social network that will probably resell them. Also a dodgy legal situation, esp. re GDPR: those people in your address book didn’t give you permission to share their contacts with a 3rd party company.