Company-sponsored text numbers are different. There’s no area code, no digit spacing. Will the scammers figure out how to make it look like a 4-digit number?

Money expert Martin Lewis says mobile phone customers can save money by sending a text to a 5-digit number.

So Bloch and his team built Digit like a messaging app. Opt in for daily updates on your account, or text to check your balance. Transfer funds out of your Digit account by just texting ...