Software & Apps Apps How to Stop Unwanted Calls on Your Cellphone or Landline Follow these tips to outwit marketers, scammers, and unwanted callers by Melanie Pinola Writer Former Lifewire writer Melanie Pinola has 5+ years' experience writing about consumer-oriented technology and is an expert telecommuter. our editorial process Melanie Pinola Updated on April 21, 2020 Apps Best Apps Tweet Share Email Even if you register your phone number in the National Do Not Call Registry, chances are good that you will still get some unwanted calls and texts. Robocallers are relentless; they can not only disrupt your day but, if they gain your trust, scam you out of money. Likewise, malicious text messages may attempt to solicit information that's best kept private. Even if callers and hackers don't succeed, such texts and phone calls are annoying and a hassle to deal with. Here are a few ways you can stop them. Android: Use an App to Block Junk Calls and Text Messages A few call-blocking apps are available for Android. One example is PrivacyStar (also available for iOS). It gives you control over calls and texts from not just individual numbers but numbers that are unknown or private. PrivacyStar's crowdsourced database of blocked numbers can expand your blocked list to include the worst offenders, and you can file complaints with the government for calls and text messages that are spam. PrivacyStar works best on Android. On iPhones, call and text blocking aren't available because of app restrictions, but reverse phone lookup and complaint filing work well. Download PrivacyStar iPhone: Use a "Do Not Answer" List iOS users can block numbers on a case-by-case basis. Another method is to create a distinct "do not answer" group in your contacts, and set a specific or silent ringtone for it to ignore these people. Find a list of all of the contacts you have blocked on your iPhone. Landline: Block Specific and Unknown Numbers If you still have a landline phone number, you may have even more robust blocking capabilities. For example, you may be able to enter specific phone numbers you want to block permanently on your service provider's website. Verizon, for example, has an option to block anonymous callers, but it's not very reliable; "unavailable" phone calls can still come through. If worse comes to worst and spammy robocallers are driving you crazy, contact your phone company with the numbers on hand to have them blocked permanently. Best Practices for Everyone Annoyances aside, unwanted and anonymous calls can be as much of a security risk as they are aggravating. Avoid the worst that could happen by dealing with these threats wisely: Don't respond to unwanted calls, even if the call prompts you to press a number to opt out of future messages. All that will do is verify to the spammer or scammer that your number is valid.Similarly, don't respond to unwanted text messages or click on any links. (This holds true for text messages, emails, voicemails, and phone calls.)Register your phone numbers with the National Do Not Call Registry.Don't enter your phone number in online or offline forms unless it's really necessary. Burner is a great privacy app for iPhone and Android that provides disposable phone numbers so you can protect your privacy. Telemarketers have been around since the dawn of the telephone, but as yet, there's no way to prevent their intrusions completely, so it remains up to phone users to be proactive.