A toll-free phone number for your Shopify store gives you credibility and signals your customers you’re serious.

From the Graham Cluley blog

The safety team at Twitter has responded to the high profile hack of the SEC Twitter account, which made headlines around the world.

And what do they have to say?

Well, in a nutshell - “it’s not our fault. They lost control of their mobile phone number and didn’t have 2FA enabled.”