The full scope of how the ban would impact TikTok’s user functions is still unclear, as a lawyer arguing on behalf of the app said it would go dark by Jan. 19.

After that, the app won't vanish from your phone — but TikTok will become much harder to use Within days, TikTok could be banned from being distributed in the United States and, eventually, stop working as an app altogether if the U.

The court is hearing oral arguments on TikTok’s bid to block a law that would lead to its ban in the U.S. starting Jan. 19 if it isn’t sold by its Chinese owner.