Use a secondary phone number from a VoIP or virtual number service
Enable caller ID blocking before making calls
Turn off caller ID in your phone settings if your carrier allows it
Use a prepaid SIM card purchased with minimal personal information where legal
Register messaging apps with a separate number instead of your main number
Use call forwarding from a private number to your real number
Avoid sharing your number on public profiles, forms, and directories
Use app-based authentication instead of SMS when possible
Ask your carrier about number privacy and unlisted number options
Remove your number from data broker and people-search sites
Use a burner phone for short-term anonymous communication
Use encrypted messaging apps that do not expose your number publicly
Set social media privacy settings to hide your phone number
Use a business line or separate contact number for public use