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Why my apps will soon be gone from the Google Play Store
(frozenfractal.com)
This is a most excellent place for technology news and articles.
The issue isn't acquiring a number.
It's that publishing a number implicitly comes with the responsibility to monitor that number, which is a huge burden, especially if it's readily visible to bots.
It also presumes you have a contact number. Some big companies don't for the reason you mentioned, and some smaller ones don't, because they have no need for a business number.
Haha yeah no it doesn't. Get a throw away phone from Walmart for $10. Use that number. Throw away phone.