How to Filter and Block Spam Text Messages

Overview

Learn how to enable spam protection in messaging apps, block suspicious senders, and report SMS phishing.

Quick takeaway: Start with standard verified settings, make one controlled adjustment at a time, and confirm the result before proceeding.

1. Enable SMS spam protection
In Google Messages, tap your profile icon > Messages settings > Spam protection and turn on Enable spam protection. In iOS Messages, enable Filter Unknown Senders.
2. Never click links in unexpected SMS messages
Delivery alerts, bank updates, or prize notifications often link to credential-harvesting pages. Verify through official apps instead.
3. Block and report offending senders
Open the message details, tap Block & report spam. Most cellular carriers also allow forwarding spam SMS to 7726 (SPAM).
4. Keep phone numbers off public directories
Avoid sharing your mobile number on social profiles, contest forms, or unsecured forums where scrapers collect targets.

Applying multiple configuration changes at once without noting what was changed.
Entering credentials or authorizing permissions without verifying the authentic destination.
Ignoring official software updates that patch active security vulnerabilities.
Relying on unverified third-party software for functions already provided natively.

Can replying 'STOP' make spam worse?

If the message is from an illegal scammer, replying confirms your number is monitored. Only reply STOP to verified automated business alerts.

Can SMS messages contain viruses?

A plain text cannot infect your device, but clicking links inside them can lead to malicious downloads or phishing.