How to Stop Spam Calls and Messages on Android

Spam calls and unwanted messages have become a common problem for Android users. You may receive calls from unknown numbers promoting loans, insurance, credit cards, fake offers, or suspicious services. SMS and messaging apps can also deliver unwanted advertisements and phishing links.

The good news is that Android includes several built-in tools that can help reduce spam. You can block individual numbers, enable spam protection, filter suspicious messages, and report unwanted callers.

1. Turn On Spam Protection in the Phone App

If you’re using the Google Phone app, you can enable built-in spam detection.

Open the Phone app and go to:

⋮ → Settings → Caller ID & spam

Depending on your Android version and phone manufacturer, the wording may be slightly different.

Look for options such as See caller & spam ID and Filter spam calls.

When enabled, the phone can identify numbers that may be associated with spam and, where supported, automatically filter certain unwanted calls.

This is one of the first settings worth enabling because it can reduce the number of spam calls you have to answer manually.

2. Block a Spam Number

If a particular number repeatedly calls you, you can block it.

Open your Phone app and find the unwanted number in your recent calls. Tap the number or contact information and select:

Block / Report spam

After blocking, calls from that number should no longer reach you normally.

Keep in mind that scammers often use different phone numbers, so blocking individual numbers alone may not completely stop spam.

3. Enable Spam Protection in Google Messages

Unwanted SMS messages can sometimes contain fake offers, malicious links, or attempts to steal personal information.

If you’re using Google Messages, open the app and check:

Profile picture → Messages settings → Spam protection

If available, turn on Enable spam protection.

Google Messages can use spam detection to identify suspicious messages and move some of them away from your normal conversations.

4. Don’t Click Suspicious Links

Blocking spam is useful, but avoiding the scam itself is even more important.

Be careful with messages claiming:

• Your bank account will be blocked
• You’ve won a prize
• Your parcel requires payment
• Your SIM card will be deactivated
• You have received a government benefit
• Your KYC needs immediate verification
• Your account has suspicious activity

Don’t click links simply because a message looks urgent.

Instead, open the company’s official application or website yourself and check whether there is actually a problem.

5. Report Spam Messages

When your messaging application provides a Report spam option, use it rather than simply deleting the message.

Reporting helps your messaging service identify unwanted or suspicious senders.

You can usually select a conversation and choose Block or Report spam. The exact options depend on the messaging application.

6. Be Careful With Caller ID Apps

Third-party caller identification applications can help identify unknown numbers, but they may request access to contacts, call information, notifications, or other personal data.

Before installing one, check the permissions it requests and its privacy policy.

For many users, the built-in spam protection provided by their phone and messaging application is a good starting point.

7. Reduce Promotional Calls and SMS

If you regularly receive legitimate marketing calls and messages, look for ways to opt out.

For example, if a company sends promotional messages, use its official unsubscribe mechanism where available.

For users in India, unwanted commercial communications can also be reported through telecom operator or regulatory mechanisms. Your mobile operator may provide specific options for reporting spam calls and messages.

Don’t give your phone number to unfamiliar websites simply to access an offer or download.

8. Don’t Share Your OTP

One of the most important rules for avoiding mobile scams is simple:

Never share an OTP, UPI PIN, banking PIN, password, or authentication code with someone who calls or messages you.

A legitimate bank, payment service, or other organization should not require you to disclose your private authentication codes to a caller.

If someone asks you to read an OTP over the phone, treat it as a major warning sign.

What to Do If Spam Calls Continue

If you’re still receiving large numbers of spam calls:

1. Enable your phone’s spam protection.
2. Turn on spam protection in your messaging app.
3. Block and report recurring spam numbers.
4. Don’t respond to suspicious messages.
5. Don’t click unknown links.
6. Don’t share OTPs or financial information.
7. Report persistent unwanted communications through appropriate telecom channels.

Final Thoughts

You probably can’t eliminate every spam call or message, but Android’s built-in tools can significantly reduce unwanted communication.

The best approach is to combine spam detection, call blocking, message filtering, and safe browsing habits. Most importantly, don’t interact with suspicious messages or provide sensitive information to unexpected callers.

If a message creates a sense of urgency and asks you to click a link, make a payment, install an application, or provide an OTP, stop and verify it through the organization’s official channel first.