Telegram - Chatapp

Telegram is a communication channel for instant messaging, image sharing, and document exchange. Connection is made through a personal Telegram account.

Disable two-factor authentication.
Click the “Link” button next to “Telegram”.

In the window that opens, enter the phone number connected to Telegram and click the "Check" button.

Enter the verification code received in Telegram. Do not forward the code to other subscribers, as Telegram's security system may cancel the code.

The line settings will show that the Telegram channel is connected. You can unlink the line: -- in your Telegram account settings, go to Settings → Privacy → Devices - End session; -- in the channel settings, click "Configure" → "Unlink authorization".