Only delete your account if you no longer want to use Telegram. You may not be able to sign up again immediately. To delete your account, go to this page: https://telegram.org/deactivate • It is easier if you use a non-mobile browser. • Open the link and log in. • We'll send the login code in a Telegram message (not SMS). See this guide for details: https://telegra.ph/delete-telegram-account-FAQ By the way, why are you leaving?