Android has a built-in block feature in the Phone app

You can block a number directly on most Android phones without installing anything extra. Open your Phone app, find the number or contact you want to block, and use the menu to select "Block number" or "Block contact." The exact wording and location depend on your phone's manufacturer — Samsung, Google Pixel, and other brands arrange their menus slightly differently — but the feature exists on all modern Android devices.

Once you block a number, calls and text messages from that number will not ring through or show notifications. They go to a separate folder you can check later if you need to. The person calling will not hear a message saying they are blocked; the call will straightforward fail on their end.

Key Takeaways

  • Open the Phone app, long-press the number or contact, and tap "Block number" — no separate app needed.
  • Blocked calls and texts go to a hidden folder; the caller hears a normal "call failed" message, not a block notification.
  • If you use Google Messages or Samsung Messages as your text app, you can block numbers from within those apps too.
  • You can unblock a number anytime by going to settings in your Phone app and finding the blocked list.
  • Blocking works only on your phone; the person can still reach you from a different number.

How to block a number in the Phone app step by step

Start by opening your Phone app — the one you use to make calls. Look at your recent calls list or your contacts. Find the number or name you want to block.

Long-press (hold your finger on) that entry for a second or two. A menu will pop up with several options. Look for "Block number," "Block contact," or sometimes "Block this caller." Tap it. Your phone will confirm the block with a brief message.

That is all. The number is now blocked. If they call again, you will not see a missed call notification, and the call will not appear in your recent list.

Where blocked calls and texts go

Blocked calls do not disappear entirely. Your Phone app has a "Blocked" or "Spam" folder where you can see them if you need to. This is useful if you want to check whether a blocked number has tried to reach you, or if you change your mind and want to unblock someone.

To find this folder, open your Phone app and look for a menu button (usually three dots or lines in the corner). Tap "Settings" or "Call settings," then look for "Blocked numbers" or "Spam and abuse." You will see a list of every number you have blocked.

Text messages from blocked numbers behave the same way — they are hidden from your main inbox but stored separately so you can review them later if needed.

Blocking through your text message app

If you want to block a number based on text messages rather than calls, you can do it from your messaging app. Open Google Messages, Samsung Messages, or whichever text app you use. Find the conversation with the number you want to block.

Long-press the conversation or look for a menu icon next to it. Select "Block" or "Block number." The process is nearly identical to blocking from the Phone app, and the result is the same — calls and texts from that number will be hidden.

Some people prefer blocking from their text app because they can see the full conversation history before deciding. Either method works; blocking from the Phone app or the text app blocks the number everywhere.

How to unblock a number if you change your mind

Open your Phone app and go to Settings (the menu icon, usually three dots). Select "Blocked numbers" or "Spam and abuse." You will see your full blocked list.

Find the number you want to unblock and tap it. Select "Unblock" or "Remove from blocked list." The number is now unblocked, and calls and texts from them will come through normally again.

If you blocked someone by accident, this is how you fix it. There is no penalty for unblocking — you can block and unblock the same number as many times as you need to.

What blocking does and does not do

Blocking a number on your phone stops calls and texts from that specific number from reaching you. It does not prevent the person from trying to call or text — it just hides the attempt from you. They will not receive a notification that they are blocked.

Blocking works only on your device. If someone has your number, they can still reach you from a different phone, a different number, or a messaging app like WhatsApp or Facebook Messenger. Blocking the Phone app does not block those apps.

If you are dealing with repeated harassment from different numbers, blocking individual numbers becomes tedious. In that case, you may want to look at spam-filtering apps or your carrier's call-blocking service, which can filter calls before they reach your phone at all.

When to use your carrier's spam filter instead

Your phone company — Verizon, AT&T, T-Mobile, or another carrier — often offers spam and robocall filtering as part of your plan or for a small monthly fee. These services filter calls before they reach your phone, so you never see them at all.

If you are getting many spam or robocalls, your carrier's filter may be more effective than blocking individual numbers. You can turn it on through your carrier's app or website. Check your bill or contact customer service to see what options are available to you.

Blocking individual numbers is best for people you know personally — an ex, a business you do not want to hear from, a friend you need a break from. Carrier filtering is better for unknown spam and robocalls.

Frequently Asked Questions

Will the person know I blocked them?

No. When they call, they will hear a normal "call failed" or "call could not be completed" message, the same as if your phone were off or you had no signal. They will not receive a notification saying you blocked them.

Can I block a number that is not in my contacts?

Yes. You can block any number that appears in your recent calls or text history. Long-press it and select block, even if you have never saved it as a contact.

What if someone keeps calling from different numbers?

Blocking individual numbers becomes impractical if the caller keeps switching numbers. Ask your carrier about spam filtering, or look into third-party apps like TrueCaller or RoboKiller that can filter calls more aggressively. You can also report the harassment to your carrier or local police if it is severe.

Do I need a special app to block numbers?

No. The Phone app that came with your Android phone has blocking built in. You do not need to read anything. Third-party apps exist, but they are not necessary for basic blocking.

Can I block a number on Android if I use a work phone?

It depends on your company's phone policy. Some work phones have restrictions that prevent you from blocking numbers. Check with your IT department or phone administrator if the block option does not appear in your settings.