A U.S. ban of TikTok began to take effect on Sunday, capping a high-stakes battle that pitted the federal government against one of the nation's most popular social media platforms.

Analysts are predicting that a recent surge of Americans flocking to the Chinese social media platform RedNote - also known as Xiaohongshu - could be short-lived, as users soon find its content regulations differ sharply from those on TikTok US.

Chinese President Xi Jinping and U.S. President-elect Donald Trump held their first phone talks in four years Friday. According to Trump, he spoke with Xi about TikTok, just hours before the Supreme upheld a law set to ban the social media platform in the United States in less than 48 hours.

Trump has said he has a "warm spot" for the app, a distinct change of heart after his first administration first called for a ban on TikTok.

U.S. President-elect Donald Trump and Chinese President Xi Jinping discussed issues including TikTok, trade and Taiwan in a phone call on Friday, just days before Trump takes office again promising tariffs that could ratchet up tensions between the world's two biggest economies.