Tap on their name at the top of the screen to open their profile.

On their profile page, you will see the Unblock button. Tap it to restore the connection.

Go to your Chats list and scroll down. Blocked conversations often remain visible, usually with a greyed-out or muted appearance.

Use Telegram’s global search. Tap the Search bar (magnifying glass icon) at the top of the main screen.

Open the Telegram app on your device.