I've never heard any of my co-worders asking questiona that way. It's rude if you ask a question that way in oral English.
you may hear the "how to" when they're speaking, but listen carefully to what they've said before the "how to".
I saw "How to" at the beginning of a sentence only in FAQ sections of manual pages or web site.
I have said 3 millions of times that 'HOW TO' is not a correct way to make a question. Once again, please remember what you should say is 'how do..', 'how can/could', 'how is'....I promise you I won't say that again.