Troubleshooting
Official telegram.org Source
If you have recently used one of our apps onanother device(it could also be a different app on the same device), we may send the login codevia Telegraminstead of SMS.
To receive such a code, just check Telegram from any of your connected devices. You will find it in the chat with Telegram, a verified profile with a blue check:
Login code sent via Telegram
WARNING!Please note that getting codes via Telegram should not be considered an alternative to using anup-to-date phone number. In case of a change in numbers, always make sureTelegram is connectedto a phone numberyou control, otherwise you risk losing access to your account forever.
Official Telegram Reference: https://telegram.org/faq
Part of the TGWAY.com Official Telegram Knowledge Base (98 Verified Q&As).