Asking for a phone number before showing the product creates a trust problem

I’m building Pijnhol, which delivers personalised news updates by SMS. One useful piece of feedback was that asking someone to verify their number before they’ve seen a convincing example puts the commitment before the value. The change was to show topic-specific example texts on the homepage, so people can understand what would land in their messages before signing up. The lesson is about ordering: explain what someone receives before asking for access to a personal channel. How have others handled this when their product needs a phone number? Check out the link here if you're interested - pijnhol.com all idea and feedback welcome, thanks!