X, formerly Twitter, has just opened up its video and audio calling feature to users on all tiers – allowing everyone with an X account to call other users for absolutely free. The extended capability ...

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Making phone calls without incurring traditional phone charges has become increasingly popular, thanks to the rise of free calling apps that utilize Voice over Internet Protocol (VoIP) technology.

X is slowly rolling out audio and video calling to users that don't pay for its premium subscription service that's formerly known as Twitter Blue. Enrique Barragan, an engineer for the company, has ...