When we decided to open up the Web21C SDK voice and conference services to developers outside BT, we hoped they’d be useful for people to make quick and easy phone calls to real people.

Unfortunately, some of our customers seem to have taken a different tack, and have exploited our offering to try to make money by operating various schemes and scams. In recent days, we’ve had to block increasing large ranges of phone numbers to prevent this.

We think this is unfair: we’ve updated our Terms of Use and Acceptable Use policy to make this clear.