Tips > General

Usernames Information about the public Telegram usernames.
Green Checks What are the green checks for?
Link Previews How does the link preview technically work.
Perfect Forward Secrecy Technical information about Perfect Forward Secrecy
Phone Number Visible When does one see the phone number of a person in Telegram?
Changing Phone Number How to change the Telegram phone number?
File size limits What are the current file size limits?
Account Self Destruction Inactive Telegram accounts will be automatically removed.
Broadcast Lists What exactly are broadcast lists, are there any limits?
Groups information Is there an admin? What happens if…?
Deleting the Telegram Account How to delete the Telegram account immediately.
Blocking a contact on Telegram How to block users on Telegram.
Sharing a media from WhatsApp How to share medias from WhatsApp.
Smart notifications How does smart notifications work
Supported services in link preview List of supported services for links preview system
Forwarding service notifications How does forwarding service notifications works?