Register your number on the National Do Not Call Registry (where applicable)
Enable carrier spam call blocking (AT&T, Verizon, T-Mobile, etc.)
Turn on “Caller ID & Spam Protection” in your phone’s settings
Use the Phone app’s built-in spam filtering features
Block individual numbers after each unwanted call
Report spam calls to your carrier and to the appropriate regulator/authority
Use a reputable call-blocking app from a trusted provider
Set your phone to silence unknown callers (where available)
Disable voicemail for unknown callers or enable “screening” features if offered
Avoid sharing your number on untrusted sites and forms
Use a secondary number for online sign-ups and promotions
If you answer, don’t engage; hang up immediately
For repeat offenders, submit their numbers to your carrier’s spam reporting tools