Someone on social media has said Paul's given out a private number for What's App to fans who send private messages to "The Real Paul McCartney" on FB. I don't buy into it and giving a friendly heads up to anyone ellse who's received this on FB.
There are so many idiot scammers on the Beatles/Paul FB pages I belong to that answer every post as if they're the real Paul and give a link to talk to him! They get blocked by the Admins pretty quickly, but then another will pop up.
The only legitimate text number is (212) 313-9547 which Paul gave out at his last concert tour in 2019. I get texts all the time on holidays and on other special McCartney events, like when The Lyrics was named Barnes & Noble's book of the year or when the cool "Find My Way" video was released. If you respond, you continue to receive future texts. Of course it's not really Paul himself texting - he has people do it for him, but it's kind of neat when you get one of these texts.