Answer 1

Free piece of advice for anyone:
Avoid sharing your number online. There are multiple nefarious ways your number can be used for.
Many posts on SL are like "How to become a Hacker". A comparable number of posts are "let's make a whatsapp group: write me your phone number to add you".
Not judging the intentions here, just pointing out that your phone number can be a quite sensitive piece of personal info, you may not want other people to tamper with.