There was a secret problem with the Telegram app for phones that could let bad guys trick you with fake videos.
These videos looked normal but were actually hiding a secret code that could let them steal your stuff!
If you clicked on these fake videos, you might have been tricked into downloading a bad app that could steal information from your phone.
But don't worry, the problem is fixed now! Make sure you update Telegram to the latest version to keep your phone safe.
