Since phone numbers are universally available and no further hardware is required, phone number verification makes for a globally accessible and relatively inexpensive solution to ensure security.

Snap's latest developer offering is a tool called Verify that's aiming to save its mobile-first developers cash on verifying user phone numbers en masse.

If you want your privacy back, then you should definitely check out these free email services without phone verification.

With this in mind, Telegram is now offering its own number verification solution. “We know from our own experience how expensive it can be for businesses to verify phone numbers of their customers.

Twitter has changed its terms to mandate phone number verification for users to purchase the Twitter Blue subscription.