Device Management. In
Settings > Devices you can see all the places where you are logged in.
Tap
Link a Desktop Device to quickly log in on Telegram Desktop or Web via
QR Code.
Select an individual device to choose whether it can accept
incoming calls or Secret Chats – or to
log it out remotely.
All devices can also be set to
log out automatically after a certain period of inactivity – ranging from
1 week to
6 months.