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Don’t reply “STOP” to an unexpected or suspicious text. A response can confirm that your number is active or start an exchange with a scammer. But “STOP” is a normal way to opt out of messages from a legitimate organization you recognize. The key is who sent the message—not the word itself.
Should you reply STOP to a spam text?
If you don’t recognize the sender or the message seems suspicious, don’t reply—not even to tell the sender to stop. The FTC warns that replying to an unfamiliar text can confirm that it reached a working number, and CTIA gives the same advice for texts you don’t recognize. That may invite further contact, but it does not mean every reply will cause more spam.
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If the message is from a legitimate organization you recognize and you no longer want its texts, replying STOP is a standard opt-out method. CTIA says automated messages should let recipients opt out this way. The Federal Communications Commission also recognizes reply texts as a reasonable, widely understood way to revoke consent; when a messaging protocol does not support replies, alternatives must be available.
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| Message | What to do | Why |
|---|---|---|
| Unexpected, unknown, or suspicious | Don’t reply or click. Report it, then delete and block or filter the sender. | A reply can confirm the number is active or engage the sender. |
| Unwanted texts from a legitimate organization you recognize | Reply STOP to opt out. | STOP is a recognized opt-out route for legitimate automated messages. |
| A text that might involve a real account, package, toll, job, or loan | Check independently through the organization’s known app, website, or phone number. | A text’s links and contact details may lead to a scammer. |
What to do with a suspicious text
- Pause before acting. Be especially cautious if a message asks for money or personal information, creates urgency, or links to an account, delivery, toll, job, or loan problem. If it might describe a real issue, contact the organization using details you already trust—not links or numbers in the message. The FTC’s guidance on unexpected texts is available at its consumer alert.
- Don’t reply or click. A short answer can still show an unknown sender that your number is working. The FTC explains the risk in its advice about texts from strangers.
- Report it. Use your messaging app’s report-junk or spam feature if available, or forward the message to 7726 (SPAM). The FTC says forwarding can help wireless providers identify and block similar messages; CTIA also recommends reporting texts this way. See the FTC’s spam-text reporting guidance and CTIA’s spam-text advice.
- Delete and block or filter. After reporting, remove the message and use your phone’s available blocking or filtering controls.
- Report suspected fraud or illegal texting. For a scam, the FTC directs consumers to ReportFraud.ftc.gov. CTIA points consumers to the FCC for suspected illegal calls or texts and spoofing scams.
How to reduce unwanted texts
Phone menus differ by device and software version, so look in your messaging app and phone settings for options to block a number, filter unknown senders, or report junk. Your wireless provider may offer additional spam tools. Some third-party call-blocking apps also filter texts, but check that an app supports your phone and messaging setup, and review its privacy practices before granting access. The FTC outlines these options in its guide to recognizing and reporting spam texts.
#1 Best Overall
- 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.
These tools can reduce unwanted messages; blocking one number does not guarantee that similar messages cannot reach you from another number. Availability and features vary by phone, carrier, and app.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Why scammers use text messages
Texting can be an effective way to reach people. An FTC consumer alert from April 2025 cited a study reporting text-message open rates as high as 98%. That figure describes the study’s reported open rate; it is not evidence that replying STOP causes more spam.
Quick Recap
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.
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.
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.
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