There is no substantiated evidence that three phone settings will silence 95% of spam calls and scam texts. But built-in caller screening, spam filtering, and message controls can reduce interruptions and help you spot suspicious contact. The exact options depend on your phone, software, carrier, and country.
1. Turn on your phone’s built-in spam call protection
Android with Google’s Phone app
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Open the Phone app and tap the three-dot menu, then Settings.
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Tap Caller ID & spam and turn on caller ID and spam protection.
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If available, turn on Filter spam calls. The menu and options can vary by device and software version. See Google’s Phone app guidance.
#1 Best Overall
CPR V5000 Call Blocker for Landline Phones - You Can Manually Block All Calls with the Big Red Button - Pre-Programmed with 5,000 Known Nuisance Numbers - Caller ID is Required- COMPATIBILITY: For traditional analog landline phones and services from providers such as AT&T, Verizon, Frontier Communications, CenturyLink, and Brightspeed. Not compatible with internet-based or digital phone services (VoIP), including Vonage, Ooma, Xfinity Voice, and Quantum Fiber.
- IMPORTANT: The V5000 CPR Call Blocker requires Caller ID service and an analog telephone line. Without Caller ID, incoming numbers cannot be identified or blocked. No mains power required - just plug it into your phone line and use.
- Powerful Blocking, Made Simple: Preloaded with 5,000 verified scam and nuisance numbers, the V5000 starts protecting you right out of the box. And if a new or spoofed number gets through, the large “BLOCK NOW” button makes it easy to instantly block it - up to 1,500 additional numbers at your command.
- Realistic & Reliable Protection: While no device can stop 100% of spam (scammers constantly change numbers), the V5000 gives you the power to shut down repeat offenders quickly and effectively - offering more control than passive filters alone.
- Hassle-Free Design: NO POWER supply needed, NO APP, and NO SUBSCRIPTIONS. The V5000 is easy to install, with a clear screen and loud button click for extra confidence. Designed with seniors in mind, it’s ready to use and simple to maintain. For even stronger protection, you can pair it with your phone provider’s spam filtering service.
Filtered calls may not trigger missed-call or voicemail notifications, but they remain in call history; check voicemail if you are expecting an important call. Google says numbers outside your Contacts may be sent to Google to identify callers or assess spam, so consider that privacy trade-off before enabling caller identification.
Google Call Screen on supported devices
On supported devices and in supported markets, Call Screen can ask callers why they are calling so you can decide whether to answer. It does not catch every spam call. Availability and controls vary; check Google’s Call Screen guidance for your device and location.
Rank #2
- [ IMPORTANT NOTE 1 ] This product is a call blocker only and does not have a telephone or answering machine function. No phone or answering machine is included in the package. Before purchasing, please make sure that your telephone line has Caller ID service and that it is an ANALOG line. the ENF860 requires Caller ID service from your telephone line provider to work and is for analog lines only ! No mains power required, just plug in the phone line to use
- [ IMPORTANT NOTE 2 ] In BLOCK mode, there will STILL BE some new variant numbers bypassing the database making the phone ring, you NEED to manually set up to block them OR switch to FAMILY mode to let only the numbers in FAMILY LIST through. Please refer to the manual for the CORRECT SETTINGS.
- Dual mode;In BLOCK mode you can block callers by Numbers and Names; In FAMILY mode all callers outside the FAMILY LIST are blocked;The two modes can be switched at any time as needed and NO data will be lost after switching modes.
- Preloaded with a large number of spam numbers that have been the subject of repeated complaints ; Users can also manually add 4000+ numbers to the NUMBER LIST to build their own database ; Add 256 NAMES to block calls by name.
- Blocks INTERNATIONAL, PRIVATE/WITHHELD, and Out of Area numbers by default; users can SET to block the entire area code or changing numbers starting with a fixed number, such as 00, 800, 855, 999, 7324, 33626, 134567, etc.
2. Screen or silence unknown callers
iPhone
Open Settings and look under Apps > Phone for the available options to screen or silence unknown callers. Labels and choices can differ by iOS version. Silencing unknown numbers can reduce ringing, but a legitimate call from a number you have not saved may also be silenced. Add family, schools, medical offices, and other important contacts to Contacts. Apple’s caller guidance explains the available controls.
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Silencing spam identified by a carrier is a separate option and works only with certain carriers. If you prefer to judge a caller before answering, screening may be a better fit than silencing; check recent calls and voicemail for anything you might have missed.
Rank #3
- How it Works: SPAM identified calls are instantly blocked automatically. Preferred Calls Ring through like normal with Caller ID displayed. Your phones connected to the TEL port Won't Ring on Blocked Calls. Create your own Invited or Allowed Family (White List) and block All other callers. Use the Dual Block Buttons to Block a NAME or NUMBER Displayed. Remote Block a Call when Dialing * 2 # through your telephone handset.
- The Patented ProSeries 3 Call Blocker from Digitone is an Easy Installation and is Simple to Use. No need to rush over and tap a red button when the ProSeries has already blocked a known unwanted SPAM, Out of Area, Private, Anonymous, 800 Service, ROBO?, Dashes, "Quotes" or V123+ call. Use Call History to select Any Caller to Block by (Double Tap) Name or Number. Block any NAME like: Unavailable, Unknown, SCAM RISK, City + State, Potential Scam, Wireless Caller. Block ANY call without answering, as they call in with either RED button.
- Feel confident that the ProSeries already Blocks Millions of Known Unwanted Numbers and Fake Names. No need to change your existing phones or service. Works with Any Analog Corded, Cordless Phone or Fax System on any telephone service. Large Back-Lighted Display. Got questions? Call the number on the front screen of the ProSeries 3.
- Works with all USA phone companies: AT&T, Cox, Spectrum, CenturyLink, Cable Modems, DSL, FIOS, or Digital Services from VoIP Telcos like [V] from Verizon, Ooma Telo, Ooma Basic, Vonage, Magic Jack etc. Also, works in Mexico, Canada, Brazil, European Union (ETSI), Australia, Singapore and others with North American standardized phone lines.
- Allow any blocked caller to ring through like normal with the Green Invite Button. Double Tap the Green Button to add VIP callers shown in Call History. Note: Caller ID Name and Number Service from your phone company is required for this model to work automatically.
Android
Google’s Call Screen is available only on supported devices and in supported markets. Check its settings and eligibility in Google’s Call Screen guidance. Google’s Scam Detection is also limited to specified Pixel models and countries, and Google cautions that it is not completely accurate: “Scam Detection is not 100% accurate and scammers constantly change their tactics.” See Google’s Scam Detection guidance.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.3. Filter unknown texts and block or report spam
iPhone Messages
Open Settings > Apps > Messages and look for message filtering options. You can screen messages from unknown senders and, where supported, filter categories of SMS, MMS, and RCS messages into folders. Availability and behavior vary by region and configuration. Review filtered folders so a legitimate first-time message does not go unnoticed. Apple documents the options in its iPhone message-filtering guide.
Rank #4
- This is the latest version Telephone Call Blocker with hidden or unavailable call numbers can be blocked. And there is no fees to use it; Please keep the manual for future use.
- Block up to 4000 individual phone numbers, including incoming and outgoing calls , prefixes and up to 10 digit area codes.
- One-touch to Block: Locate a number and then press Block to add it to the blacklist.Better set the call blocker in series ( one end of it connected to your phone and another end to the PSTN telephone line); Though it can also be set up parallel, but not compatible with some phone systems.
- Permanent storage of the numbers in the blacklist even power is off or telephone line is plugged out.
- Battery free: It is line powered, no need battery. And it works with almost all single line telephones. If you find some numbers are blocked but you never mean to, then press Block and check your blacklist, then delete those numbers which like area codes or prefix numbers.
Android and other messaging apps
Filtering and reporting controls depend on your messaging app and device. Open the conversation’s details or menu to look for options to block or report the sender; labels differ between apps. If you cannot find a setting, search Settings for message filtering or spam.
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1Clear out junk files and repair common Windows errors2Scan for outdated or missing drivers - takes under a minute3Repair Windows errors before they cause bigger problemsDo not open links in suspicious texts or share passwords or one-time codes in response to unsolicited messages. If a text claims to be from a bank, delivery service, or government office, verify it through a number or website you already know is genuine rather than using the contact details in the message. The FTC explains call-blocking options and unwanted-call risks in its unwanted-calls guidance.
Choose the right balance, then check what was filtered
| Approach | What it does | What to watch for |
|---|---|---|
| Spam identification and filtering | Warns about or filters calls the phone identifies as suspected spam. | Options vary by device; filtered calls may require checking call history or voicemail. |
| Screening | Lets a supported phone or feature gather information from a caller before you decide to answer. | It is not available on every device or in every market, and it does not catch every spam call. |
| Silencing unknown callers | Reduces ringing from numbers that are not saved or identified under the phone’s rules. | Legitimate callers using new numbers may also be silenced. Save important contacts and review calls and voicemail. |
| Message filtering and blocking | Moves some messages to filtered folders and lets you block or report unwanted senders. | Availability varies, and legitimate messages from unknown senders can be filtered too. |
Filters are useful but imperfect: a scam can get through, and a legitimate caller or message can be misclassified. Start with the controls already on your phone; a third-party call-blocking app is optional, not a demonstrated requirement. If a setting is missing, search Settings for spam, unknown callers, or message filtering, then check the device maker’s or carrier’s instructions for your model and region.
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