Block a Single Contact's Text Messages
The fastest way to stop texts from one person is to open the conversation thread, then look for a menu or settings option tied to that contact. In the default Messages app on most Android phones, open the text thread from the person you want to block, tap the three dots or menu icon at the top of the screen, and select "Block" or "Block number". The exact wording changes between phone makers — Samsung calls it "Block contact", while Google's Messages app says "Block number".
Once you block someone, their texts still arrive on their end, but they go nowhere on your phone. You won't see them in your inbox, and you won't get a notification. The person texting you has no way to know they're blocked — Android doesn't send them a delivery failure or read receipt. If they call instead, the call will ring through normally unless you've also blocked them in your phone's contacts.
To unblock the same number later, go back into that conversation thread (it will still exist in your message history), tap the menu, and select "Unblock". The thread reappears in your inbox and texts from that number come through again.
Key Takeaways
- You can block a single contact directly from a text conversation by opening the thread, tapping the menu icon, and selecting "Block" or "Block number".
- Blocked texts still send from the other person's phone but never reach your device, and they receive no notification that they're blocked.
- Unknown numbers and spam texts can be blocked through your phone's default Messages app or through a third-party app like Google's Phone app.
- Blocking someone in Messages does not block their calls, emails, or contact requests — you must block those separately in their contact card or in the Phone app.
- You can view a list of all blocked numbers in your phone's Settings under "Apps" or "Messages" depending on your Android version and phone maker.
Block Unknown Numbers and Spam Texts
If you're getting texts from numbers you don't recognize, you have two options: block them one at a time, or turn on spam filtering. For a single unknown number, open the text message, tap the menu icon (three dots), and choose "Block number". That number will never text you again.
To filter spam automatically, open your Messages app, go to Settings (usually a gear icon), and look for "Spam protection" or "Block unknown senders". Turn this on, and the app will sort suspected spam into a separate folder instead of your main inbox. Google's Messages app calls this "Spam and abuse" protection. Samsung's default app calls it "Spam filter". The exact name depends on which app came with your phone, but the function is the same — it learns from your blocks and catches similar messages before they reach you.
Be aware that spam filtering is not perfect. Some legitimate texts from banks, delivery services, or appointment reminders might land in the spam folder by mistake. Check your spam folder once a week to make sure nothing important got caught.
Block Texts Through Your Phone's Settings
If your Messages app doesn't have a built-in block feature, or if you want to manage all your blocked numbers in one place, you can block through your phone's main Settings. Go to Settings, then look for "Apps" or "Applications". Find your Messages app in the list, tap it, and look for "Permissions" or "Advanced". Some Android phones have a "Block numbers" or "Blocked contacts" option here.
Alternatively, open your Contacts app, find the person you want to block, tap their name, then tap the menu icon and select "Block contact". This method blocks them across your entire phone — texts, calls, and contact requests all get stopped. It's more thorough than blocking through Messages alone, because it affects every app that uses your contacts.
To see your full list of blocked numbers, go to Settings, search for "blocked", and you should find a "Blocked numbers" or "Blocked contacts" section. This shows everyone you've blocked across all apps and lets you unblock anyone with a single tap.
Use a Third-Party App for Advanced Blocking
If your phone's built-in blocking isn't catching enough spam, or if you want more control over which messages get through, download Google's Phone app (free, available on Google Play Store). Open it, tap the menu, go to Settings, then "Spam and abuse". You can turn on spam filtering, block specific numbers, and even block calls and texts from people not in your contacts.
Other options include apps like TrueCaller or Mr. Number, which maintain databases of known spam numbers and block them automatically. These apps work by comparing incoming texts and calls against lists of numbers reported by other users. Download them from Google Play Store, grant them permission to access your messages and calls, and they'll start filtering in the background.
The trade-off with third-party apps is that they need access to your messages and contacts to work. Read the privacy policy before installing to understand what data the app collects. Google's Phone app is the safest choice if you want a third-party option, because Google doesn't sell your data to advertisers.
What Happens When You Block Someone
When you block a number on Android, the person can still send you texts — they just won't reach your phone. From their perspective, the message sends normally. They won't see an error message, a delivery failure, or a notification that you blocked them. The only way they'll know is if they try to call you and the call goes straight to voicemail, or if they notice you never respond to their texts.
Blocked texts don't appear in your inbox, but they're not deleted from the network. If you unblock the number later, any texts they sent while you were blocking them will not suddenly appear on your phone — they're gone. Your phone only receives new messages from that number once you unblock it.
Blocking someone in your Messages app does not block their calls, emails, or social media messages. If you want to block them completely, you need to block them separately in your Phone app (for calls), your email app, and any social media apps you use. Some phones let you block a contact across all apps at once through the Contacts app, but this varies by phone maker.
Unblock a Number You Blocked by Mistake
If you blocked someone and want to unblock them, the process is simple. Open your Messages app, find the conversation with that person (it will still be in your message history, just with no new messages), tap the menu icon, and select "Unblock". Alternatively, go to Settings, find "Blocked numbers" or "Blocked contacts", find the number in the list, and tap "Unblock".
Once you unblock, texts from that number come through normally again. You'll start getting notifications for their messages, and they'll appear in your inbox like any other conversation. There's no waiting period — unblocking takes effect immediately.
Frequently Asked Questions
Can someone tell if I blocked them on Android?
No. Blocked texts send from their phone normally, and they receive no notification. The only sign they might notice is if they call you and the call goes straight to voicemail, or if you never respond to their messages. Even then, they can't be certain you blocked them — you might just be ignoring them.
Do blocked text messages take up storage space on my phone?
No. Blocked texts never reach your device, so they don't use any storage. They exist only on the sender's phone and on your carrier's network, then disappear after a set time.
If I block someone, will they still see my profile picture or status?
Blocking in your Messages app only affects text messages. It doesn't change what they see in your contacts, your social media, or other apps. If you want to hide your profile picture or status from someone, you need to adjust privacy settings in each app separately.
What's the difference between blocking and muting a conversation?
Muting silences notifications from a conversation but the texts still arrive and appear in your inbox. Blocking stops the texts from reaching your phone entirely. Use muting for conversations you want to read later but don't need alerts for. Use blocking for people you don't want to hear from at all.
Can I block texts from a specific word or phrase?
Most Android phones don't have built-in keyword blocking in the Messages app. However, some third-party apps like TrueCaller let you create custom filters based on message content. Check your Messages app settings first — some phone makers add this feature, but it's not standard across all Android devices.