How to block text spam on Android

Text spam is usually trying to get you to click, call, pay, or share. Block Guard now handles text spam through both rule-based filtering and link-safety checks inside the messaging workflow.

Step 1: Make Block Guard your default SMS app

Android only allows one default SMS app to fully send, receive, and filter SMS and MMS. Without that role, Block Guard cannot run the full messaging and text-blocking stack.

Step 2: Turn on text blocking

• Open Text Message Blocking.
• Enable the master toggle.
• Use the three tabs for blocked senders, blocked keywords, and blocked message log.

Step 3: Add sender and keyword rules

• Add exact blocked senders for repeat offenders.
• Add regex sender rules when spam rotates through one number pattern.
• Add keywords or regex keyword rules for repeated bait like fake delivery notices, loan spam, or prize scams.
• Whitelist trusted senders when a real conversation should bypass aggressive rules.

Step 4: Watch for dangerous links

• Block Guard warns on known phishing domains.
• It can also warn on suspicious shortened links, payment lures, credential harvesting language, and urgent-action wording around a link.
• If a warning appears, do not trust the message just because the sender looks familiar.

For a feature overview, read SMS spam blocker for Android. For settings and Help Center topics, read Help Tools and setup.