Troubleshooting
Official telegram.org Source
If you know your friends have Telegram, but you can't see them — or they appear as numbers instead of names.
Android:
- Make sure you are using the latest version of the app.
- Relaunch the app (by terminating it from processes list and launching again).
- Temporarily change the name of the contact in phone contacts (add a few symbols, then change back again).
- If that didn't help, re-login. Remember that logging out kills your Secret Chats.
iOS:
- Force quit the app (double tap home button, then swipe up on Telegram), then relaunch and check if it helped.
- If that doesn't help, temporarily change the name of the contact in phone contacts (add a few symbols, then change back again).
- If that doesn’t work, re-login: Settings > Edit > Log Out. Remember that logging out kills all your Secret Chats. Then log in again.
Official Telegram Reference: https://telegram.org/faq
Part of the TGWAY.com Official Telegram Knowledge Base (98 Verified Q&As).