Set "Who can link to my account when forwarding my messages?" to "Nobody". This prevents your username (and indirectly, your identity) from being linked when someone forwards your messages, especially important in public groups or channels.
Phase 3: General Security and Anonymity Best Practices
These steps enhance overall security and further protect your anonymity, regardless of your phone number setup.
Enable Two-Step Verification (2FA) (Mandatory for Security):
Go to Settings > Privacy and Security > Two-Step Verification.
Set a strong, unique password for your 2FA.
Crucially, set a recovery email. If you're using an anonymous number, use a secure, privacy-focused email provider (e.g., ProtonMail, Tutanota) that you haven't linked to your real identity. This is telegram number database your lifeline for account recovery if you lose access to your anonymous number.
Regularly Review Active Sessions:
Go to Settings > Devices (or Settings > Privacy and Security > Active Sessions).
Periodically check this list for any unfamiliar or unauthorized logins. Terminate any suspicious sessions immediately.