The fastest way to block a number on Android
Open the Phone app on your Android device — the one you use to make calls. Find the number you want to block in your call history, or search for it in your contacts. Press and hold on that number until a menu appears, then tap Block number or Block contact. That's it. The number is now blocked.
If you want to block a number that hasn't called you yet, open your Contacts app, find or create the contact, tap the three dots or menu icon at the top, and select Block. Some Android phones phrase this as Add to block list or Block this contact, but the result is the same.
Blocked numbers can still leave voicemails, but you won't see notifications for them. Their calls go straight to voicemail, and their texts arrive in a separate folder you have to open manually. They won't know they're blocked — Android doesn't send them a rejection message.
Key Takeaways
- The Phone app's call history is the quickest place to block a number — press and hold, then tap Block number.
- Blocked callers can still leave voicemails, but their calls won't ring your phone or show notifications.
- Text messages from blocked numbers go to a separate folder in your Messages app instead of your main inbox.
- You can unblock a number at any time by going to your Phone app settings and finding your block list.
- Different Android manufacturers use slightly different wording, but every Android phone has a built-in blocking feature.
Blocking a number from your call history
This is the method most people use because the number is already right there. Open your Phone app and look at the list of recent calls. Find the number or contact name you want to block. Press your finger on it and hold for a second or two until a menu pops up with several options.
Look for the option that says Block number, Block contact, or sometimes Add to block list. Tap it once. Your phone will confirm the block — you might see a message like "Number blocked" or the option will straightforward disappear from the menu. The number is now blocked.
If you accidentally block the wrong number, you can undo this when ready by tapping Undo if that option appears. If it doesn't, don't worry — you can unblock it later through your phone's settings.
Blocking a contact you've saved
If the number is already in your Contacts app, you can block it from there. Open Contacts and find the person's name. Tap on their contact card to open their full details. Look for a menu icon — usually three vertical dots or three horizontal lines — at the top right of the screen.
Tap that menu icon. You'll see several options. Look for Block contact, Block number, or Add to block list. Tap it, and the contact is blocked. You'll usually see a confirmation message.
Blocking a contact this way blocks all phone numbers associated with that contact. If someone has multiple numbers saved under their name, all of them will be blocked at once.
Blocking a number that hasn't called you yet
Sometimes you want to block a number before they ever call. Open your Contacts app and tap the plus sign or Create contact button to make a new contact. Enter the phone number you want to block in the phone number field — you don't need to fill in a name if you don't want to.
Once you've entered the number, save the contact. Then open that contact's details, tap the menu icon at the top, and select Block contact. The number is now blocked even though you've never received a call from it.
Alternatively, some Android phones let you type a number directly into the Phone app's search bar, then block it from there without creating a contact first. Try searching for the number in your Phone app — if a block option appears, you can use that instead.
Finding and managing your block list
To see all the numbers you've blocked, open your Phone app and look for the menu icon (three dots or lines). Tap it and look for Settings, Call settings, or Blocked numbers. The exact name varies by phone manufacturer.
Once you're in that menu, you should see a list of every number you've blocked. From here you can unblock any number by tapping it and selecting Unblock. You can also block new numbers directly from this screen on some phones — look for a plus sign or Add button.
If you can't find a block list in your Phone app settings, try opening your Messages app instead. Some Android phones keep their block list in the messaging app rather than the phone app. Look for Settings or a menu option that mentions blocked contacts or numbers.
What happens when you block a number
When someone calls from a blocked number, their call goes straight to your voicemail without your phone ringing or showing a notification. You won't see a missed call from them in your call history. If they leave a voicemail, it will appear in your voicemail inbox, but you won't get an alert that it arrived.
Text messages from blocked numbers don't appear in your main message thread. Instead, they go to a separate folder — usually called Blocked messages or Spam — that you have to open manually to see. Most people never check this folder.
The blocked person doesn't receive any notification that they've been blocked. Their call won't fail or give them an error message. From their perspective, the call straightforward didn't go through, which could mean your phone was off, you didn't answer, or any number of other reasons.
Unblocking a number if you change your mind
Open your Phone app and go to Settings or Blocked numbers, just as you would to view your block list. Find the number you want to unblock and tap on it. Select Unblock or Remove from block list. That number is now unblocked and can call and text you normally again.
Once you unblock a number, they'll start appearing in your call history and message threads again. You'll get notifications when they call or text. There's no waiting period — the unblock takes effect when ready.
If you've blocked a contact and later want to unblock just one of their phone numbers, you may need to edit the contact to remove the block from that specific number, depending on your phone model. Check your contact's details and look for a block or unblock option there.
Frequently Asked Questions
Can a blocked number still reach me through other apps like WhatsApp or Facebook Messenger?
No. Blocking a phone number only blocks calls and text messages through your phone's native Phone and Messages apps. If someone has your contact information in other apps, they can still message you there. You would need to block them separately within each app using that app's own blocking feature.
Will a blocked number know they're blocked?
No. A blocked call straightforward doesn't go through, and the caller won't receive any message saying they've been blocked. From their perspective, it might seem like your phone is off or you're not answering. They may eventually realize something is wrong if they never hear back, but Android doesn't tell them directly.
What if I block someone by accident?
You can unblock them when ready by going to your Phone app's Settings or Blocked numbers list, finding their number, and tapping Unblock. If you realize the mistake right after blocking, look for an Undo option that might appear briefly on your screen. Once unblocked, they can call and text you normally again.
Do blocked voicemails take up storage space on my phone?
Yes, voicemails from blocked numbers still save to your voicemail inbox and use storage space. If you want to delete them, you'll need to open your voicemail folder, find messages from that blocked number, and delete them manually. Some phones let you delete all voicemails from a blocked contact at once.
Can I block a number without saving it as a contact first?
Yes. You can block a number directly from your call history by pressing and holding on it, or by creating a temporary contact with just the phone number and then blocking that contact. Some Android phones also let you search for a number in the Phone app and block it without saving it.