> ...it’s hard to tell when some service wants your number for proper 2FA, or when they want it as a separate authentication mechanism they just happen to call

> ...it’s hard to tell when some service wants your number for proper 2FA, or when they want it as a separate authentication mechanism they just happen to call “2FA.” ...or when they want it to be able to call or text you with other BS entirely. I hesitate to give my cell number to any company. I have a separate number (formerly a landline, now strictly a voicemail box) that I use specifically for companies. I gave my cell number to a new dentist recently, thinking "medical office, probably important they be able to reach me." That turned out to be a mistake. They subscribed me to an automated appointment confirmation service, and they also send me a text (from a different number than the confirmation service) after I finish a visit to solicit reviews. This is exactly why I hate giving it out.