Musk had said that X users will be able to make video and audio calls through the platform without having to share their numbers.

Elon Musk’s social media app X, formerly Twitter is rolling out audio and video calls on the platform.

“Early version of video and audio calling on X,” Elon Musk wrote in a post that contained a screenshot showing how to turn the new feature on in the settings.

According to a report in The Verge, several X users received a notification when opening the app stating: “Audio and video calls are here!”

X has not officially launched the audio and video calling on the platform. However, the company appeared to test it with a cryptic post saying “ready for it…?” just before the feature started appearing, the report said.

The screenshot shows options of enabling voice and audio calls to those in a user’s address book, all verified users and to people they “follow” on the platform.

Elon Musk in August had said that X users will be able to make video and audio calls through the platform without having to share their phone numbers.

Musk, who bought Twitter last year for $44 billion, said X will serve as an “effective global address book” for the new features and that users will be able to make calls through X on iOS, Android, Macs and PCs.

Since acquiring Twitter, Musk has axed the signature blue bird logo and introduced a raft of changes, including reinstating formerly banned users and scrapping the ability to block accounts.

Earlier this month, X began testing a $1-per-year subscription fee for new accounts on the web that want to post or interact with other users, saying the measure has the potential to reduce spam, automated bot accounts and manipulation of its service.

The test, called “Not a Bot,” rolled out in New Zealand and the Philippines, X said in a blog post Tuesday. New users who don’t pay the fee won’t be able to take certain actions on the site, including writing posts, liking, replying or bookmarking.

“This will evaluate a potentially powerful measure to help us combat bots and spammers on X while balancing platform accessibility with the small fee amount,” according to the blog post.

“Within this test, existing users are not affected,” the blog said. “Read for free, but $1/year to write,” Musk posted on X following the announcement.