How to Stop Spam Texts on iPhone and Android
Unpaid tolls you don't owe. Packages you never ordered. Job offers you never applied for. A "wrong number" that wants to keep chatting. Spam texts have overtaken spam calls for many people — and they're more dangerous, because every one carries a link or a hook. Here's how to filter them on both platforms, the STOP-reply rule most people get backwards, and how to report senders so carriers shut them down.
First, Know What You're Dealing With
Spam texts fall into two very different buckets, and the correct response differs:
- Legitimate marketing you opted into (knowingly or not) — retailers, restaurants, political campaigns. These come from real businesses that honor opt-outs, usually from 5-6 digit short codes.
- Criminal smishing — phishing by SMS. Fake toll bills, fake delivery problems, fake bank alerts, fake job offers, "wrong number" romance bait. These come from rotating 10-digit numbers or email addresses, and no rule applies to them except: don't engage.
The STOP Rule Most People Get Backwards
Reply STOP to legitimate marketers. US carriers and messaging rules require businesses using short codes to honor STOP immediately. It works, and it doesn't "confirm your number" in any way that matters — they already have your opt-in.
Never reply STOP to a scam text. Criminals ignore opt-outs; a reply only proves a human reads this number, which upgrades you to hotter target lists — the same dynamic as answering a spam call. If you didn't sign up for it and it's from a random 10-digit number, delete and report — don't reply anything.
Filter Spam Texts on iPhone
- Filter unknown senders: Settings → Apps → Messages → scroll to Message Filtering → turn on Filter Unknown Senders. Texts from people not in your contacts move to a separate "Unknown Senders" list, and you won't get notifications for them.
- Report junk: in a conversation from an unknown sender, tap Report Junk under the message to delete it and report to Apple and your carrier.
- Block repeat senders: open the conversation → tap the name/number at top → Info → Block Caller.
- Optional third-party filters: Settings → Apps → Messages → Message Filtering lets SMS-filter apps sort junk automatically. Filtering happens on-device categories; iMessages from contacts are never touched.
Note: filtered senders can still text you — messages just land silently in the filtered list. Check it occasionally for legitimate first-time texts (delivery drivers, doctors' offices).
Filter Spam Texts on Android
Google Messages (Pixel and most Android phones)
- Turn on spam protection: Messages → profile icon → Messages settings → Spam protection → enable. Suspected spam is moved to Spam & blocked automatically, with a warning banner on borderline messages.
- Report spam: long-press the conversation → Block → check Report spam → OK. This blocks the sender and reports to Google and your carrier.
- Review filtered messages: profile icon → Spam & blocked.
Samsung Messages
- Enable caller/message protection: Messages → ⋮ → Settings → Block numbers and spam → turn on Caller ID and spam protection (powered by Smart Call/Hiya).
- Block and report: long-press a conversation → Block, with an option to report as spam.
Report to 7726 — The Carrier Spam Line
All major US carriers share a free spam-reporting shortcode: 7726 (spells "SPAM"). Forwarding spam texts there feeds the carriers' network-level filters — it's the single most effective thing you can do to get a sender shut down for everyone, not just yourself:
- Long-press the spam message (don't tap any links) and choose Copy or Forward.
- Forward it to 7726.
- The carrier replies asking for the sender's number — send that too.
On iPhone, Report Junk handles this automatically for participating carriers; on Google Messages, Report spam does the same. Manual 7726 forwarding works everywhere regardless.
The Current Big Smishing Campaigns
- Unpaid toll texts — "your vehicle has an outstanding toll; pay now to avoid penalties." Toll authorities don't collect by text link. Check your actual toll account directly if unsure.
- Package delivery problems — fake USPS/UPS/FedEx "address issue" texts. Track packages only through the retailer's or carrier's official site or app.
- Bank fraud alerts — "did you authorize $500 at...? Reply or call this number." Call the number on the back of your card instead, never the one in the text.
- "Wrong number" openers — a friendly stranger keeps chatting after you say they have the wrong person. This is the opening of a pig-butchering investment scam. Block without replying.
- Job offers you never applied for — easy remote work, big pay, contact on WhatsApp. Recruiting scams harvesting personal data or advance "fees."
The Complete Anti-Spam-Text Routine
- Enable filtering — Filter Unknown Senders (iPhone) or Spam protection (Android).
- Never tap links in unexpected texts — navigate to the organization directly instead.
- Reply STOP only to legitimate marketers; silence for everything else.
- Forward scams to 7726 and report junk in your messaging app.
- Slow the source — spam texts come from the same leaked lists as spam calls. Here's how your number leaks and how to slow it.
- Pair it with call screening for full coverage — see the call screening guide.
Frequently Asked Questions
Can a spam text infect my phone if I just open it?
Reading a text is safe on an up-to-date phone. The danger is in tapping links, downloading attachments, installing apps a text asks for, or entering credentials on the page a link opens.
Why did spam texts suddenly spike this month?
Your number likely landed on a freshly sold or breached list, or a large campaign (tolls, delivery) is cycling through your number block. Spikes usually subside within weeks; filtering and 7726 reports speed that up.
The texts come from email addresses, not numbers. What are those?
That's email-to-SMS gatewaying — a common evasion tactic since email senders are cheap and disposable. Both iPhone and Android filters catch most of these; you can also ask your carrier to block email-originated texts entirely if you never receive legitimate ones.
Does the Do Not Call Registry cover texts?
Telemarketing rules treat unwanted marketing texts like calls, so the registry applies in principle — but just as with calls, criminals ignore it entirely. Here's what the registry realistically does.
Texted by an Unknown Number?
Look it up for free to see if others have reported it for smishing, scams, or spam calls.