Twitter's official page with an "X" on the profile image is seen on July 23, 2023 in this screengrab obtained from a social media website. PHOTO: REUTERSSocial media platform X, formerly Twitter, plans to launch video and audio calls as owner Elon Musk races to build an "everything app" to stay ahead of competition from Meta Platforms-owned (META.O) Threads. Users will not need a phone number for the features that will be available on Apple's iOS, Google's Android and personal computers, Musk said in post on X on Thursday. Video & audio calls coming to X:- Works on iOS, Android, Mac & PC- No phone number needed- X is the effective global address bookThat set of factors is unique. After rebranding Twitter as X, Musk signalled he would turn the platform into a super app offering a range of services from messaging and social networking to peer-to-peer payments.