How to Block and Filter Spam SMS in Australia

A text arrives claiming your parcel is held at the depot, or that your toll account is overdue, or that your bank needs you to verify a payment — all with a link. Australians now get more scam attempts by text than by voice call, and the messages keep getting more convincing: real business names, plausible tracking updates, even sender names that look like Australia Post or your bank. You cannot stop them from being sent, but you can filter most of them automatically, block the rest, and report them so the senders get shut down.

Recognise the main types of spam SMS

Understanding what lands in your inbox helps you handle each type correctly:

• Scam texts (smishing): fake parcel-delivery notices, bank alerts, toll-road payment demands, and tax-office threats. The message pressures you to tap a link or reply quickly.
• Spoofed sender IDs: scammers can set the sender name to look like a real brand, so a fake text can appear in the same message thread as genuine messages from that brand. The sender name proves nothing.
• Marketing spam: unwanted sales texts from businesses you never dealt with. Australian businesses must follow spam rules overseen by the ACMA, including identifying themselves and offering an unsubscribe option.
• Phishing links: shortened or odd-looking URLs that lead to fake login pages designed to harvest passwords, card numbers, or one-time codes.

The golden rule for all of them: never tap links in unexpected texts. If the message claims to be from a company you use, open that company's official app or website yourself instead.

Filter spam texts on Android

Android's built-in messaging tools do a solid job if you switch them on:

1. Open Google Messages, tap your profile icon, and go to Messages settings.
2. Open Spam protection and make sure it is switched on — this automatically filters suspected spam into a separate folder.
3. Check the Spam & blocked folder periodically in case a genuine message was caught.
4. To block a sender, open the conversation, tap the three-dot menu, and choose Block.

Samsung phones have similar options under the Samsung Messages settings menu. Different manufacturers arrange these menus differently, so check your phone maker's support pages if the steps above do not match your screen. Reporting spam from inside the messaging app also helps improve filtering for everyone.

Filter spam texts on iPhone

Apple offers several layers of text filtering:

1. Go to Settings → Messages and turn on Filter Unknown Senders. Texts from numbers not in your contacts then land in a separate Unknown Senders list instead of your main inbox.
2. To block a sender, open the conversation, tap the number or contact name at the top, tap Info, and choose Block this Caller.
3. When an unknown sender's message arrives, use the Report Junk link under the message to send it to Apple and your carrier.

Newer iOS versions add extra screening options for unknown senders, so keep your phone updated and check Settings → Messages after major updates for new filtering features. As with Android, glance at the filtered folder now and then for anything genuine that got caught.

Unsubscribe from marketing spam — and know when not to

For unwanted marketing texts from real Australian businesses, replying STOP or using the unsubscribe link should end them — legitimate senders are required to honour unsubscribe requests. But never reply to an obvious scam text. Any reply, even STOP, tells the scammer your number is active and monitored, which can bring more scam attempts.

How do you tell the difference? Marketing spam identifies a real business you can look up, offers a working unsubscribe path, and does not pressure you to tap a link urgently. Scam texts push urgency, demand payment, threaten consequences, or ask for personal details. When in doubt, treat it as a scam: delete it without replying, and look up the business independently if you are worried the message might be real.

Report every scam text

Reporting is what gets scam numbers shut down, and in Australia it takes seconds:

• Forward the SMS to 0429 999 888. This is the ACMA's spam-reporting service. You will get an acknowledgement text back. Forwarding costs whatever your carrier charges for a standard SMS.
• Report the scam to Scamwatch at scamwatch.gov.au if the message tried to steal money or personal details. Scamwatch uses reports to track campaigns and warn the public.
• Report marketing-spam breaches to the ACMA at acma.gov.au/spam when a business ignores your unsubscribe request or never had your consent.

Include the sender's number or name and the message content when reporting. Screenshots help if the web form allows them. Each report feeds the intelligence that telcos and authorities use to block scam senders at the network level.

Protect yourself beyond the filter

Filters catch most junk, but the texts that get through are the most dangerous ones — targeted, timely, and convincing. Build habits that hold up even when a scam text reaches your main inbox:

• Never tap unexpected links. Open the official app or type the official web address yourself.
• Never share one-time codes. No bank, government agency, or courier ever needs a code texted to you.
• Slow down. Urgency is the weapon; a real parcel, toll bill, or bank alert will still be there after you check through official channels.
• Warn older relatives. Scam texts disproportionately hit people who trust official-looking messages — a short conversation about the parcel-text trick can save thousands.

Spam texts are a permanent feature of modern life in Australia, but a filtered inbox, a blocked-senders list, and the forwarding habit to 0429 999 888 reduce them from a daily threat to an occasional nuisance — and every report helps shut the senders down for everyone else too.