Unless you trust a person, dont give them your number, even if you bought something from them. If you must share it, do it privately (via email or a direct message) and not on a public message board. Use two-factor authentication.
Should I give my phone number to someone on a dating app?
Theres no reason to give out a phone number before meeting. Use the app to pick a time and place to meet. The most successful dating apps will have thousands of reviews. Dont be in a rush to friend someone on Facebook, which gives them access to a lot more personal information about you, your family, and your work.
Why would a guy give me his phone number?
There are many reasons a guy gives out his number, but the main reason is that he wants to hear from you. That said, he may not be that into you. He may give you his number so he can measure if youre really interested.. aka youll call if you are.. so he can have a more “sure thing”.