While these methods may help, they do not guarantee complete prevention of spam calls. Moreover, registering with the Do Not Call registry is only legally binding on telemarketers, not scammers or other unwanted callers. RoboKiller and Truecaller are great tools for identifying and blocking some spam calls, but no solution can catch every spammer.
It's common to receive spam calls, but here are a few steps you can take to minimize them:
1. Register your phone number on the Do Not Call registry (https://www.donotcall.gov/).
2. Use call-blocking apps like RoboKiller or Truecaller.
3. Answer spam calls with "stop calling" and hang up; this helps to flag the number as a nuisance caller for others.