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How to Block Calls in Android, Manually and Automatically

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It’s dinner time. You’re just sitting down when you get a call. On the other line, a robotic voice says: “We have important information regarding your credit accounts. Please hold to speak to a representative.”

*click*

How many times has that scenario happened to you or someone you know? Even if the answer is “once,” that directly translates to “too many times.” It’s scammy, annoying, and downright rude.

If you have an Android phone, though, you don’t have to deal with it. There are actually a few different ways to go about blocking numbers on Android, and we’re going to talk about a few of the easiest ones today.

Block Numbers Right From the Dialer in Android 6.0 (Marshmallow) and Up

If you’re on a phone that already has the latest version of Android (Marshmallow), then we have good news: call blocking is just a few taps away. This is a long-requested feature that Google finally brought to the table starting with Android 6.0.

The easiest way to do this is to long-press the number in your call log, then select “Block number.”

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Unfortunately, that only works on stock Android, so if you have a Samsung Galaxy device (or other non-stock phone), you’ll have to use the slightly more convoluted process: go directly to the call blocking list.

The good news is that accessing the call block list is basically the same on every device, though the menus may be named slightly different things—for example, on stock Nexus devices, you tap the three-dot overflow button to access the dialer’s menu, where you’ll tap “more” on Samsung phones to get to the same place.

So, with that in mind, go ahead and jump into the dailer (or the “phone app” as it’s often referred to). Once there, tap the three-dot menu in the top-right (again, on Samsung phones it reads “more”).

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Choose “Settings,” then the “Call blocking” option.

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This is where you’ll add the numbers of callers you’d like to ignore. Simply tap the “Add number” or “Block list” option, and key in whatever the number is. You can also choose a contact here, assuming you’ve saved the number of the annoying caller.

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When someone from this number calls you, the phone will auto-block it. No ringing, no notification. Nothing. This raises the question: if someone calls and the phone doesn’t ring, did they ever really call at all?

Automatically Send Calls to Voicemail in All Versions of Android

If you’re on an older version of Android that doesn’t have automatic call blocking, there’s another option: automatically send calls to voicemail. This method also works on stock devices running Marshmallow, if you’d prefer not to block calls entirely, but it’s not available on new Samsung phones like the S7 or S7 Edge.

Since Google decided that it makes sense to have two apps that can handle contacts (the dialer and Contacts app), there are two different ways to get this done. Regardless of which app you’d rather use, the first thing you’ll need to do is navigate to the contact you want to ignore, then edit their entry in your address book.

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Once you’re in the “edit” menu, tap the three-dot overflow button in the top right. In this menu, there’s an option that reads “All calls to voicemail.” Tick that box.

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The biggest difference between this option and auto-block is that it’s universal for the contact. So if you have two numbers listed for the same person, it will send both of them to voicemail; with the blocking feature, you can just block one but allow the other to get through.

The result here is identical to the blocking feature: no call, no notification (unless they leave a voicemail, of course). It’s almost as if they never called at all. Spooky.

Block Suspected Scammers and Spammers with Mr. Number

If you’re looking for what’s arguably the smartest ways to block calls on your Android phone, look not further than Mr. Number. This is an incredibly full-featured app, but we’re just going to focus on its call-blocking capabilities. Once you get in on the block action, though, you should definitely explore the app a bit more. It’s neat.

If you’re just looking to block all telemarketer or spam calls, Mr. Number can actually this automatically. It has three  types of auto-blocking: scam/fraud, suspected spam, and hidden numbers. Each of those categories can be toggled individually, too. It can also block individual numbers.

To enable these features, the first thing you’ll need to do is (of course), install Mr. Number. I shouldn’t have to say that, but I’m doing it anyway. For completeness.

Once the app is installed, open it and tap the overflow button in the top right corner, then select “Settings.”

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In the Settings menu, there’s a section titled “Call Blocking.” That’s what you’re looking for. Tap the “Blocking Enabled” button. It may also read “Blocking Disabled” if you just installed the app.

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In this menu, you can choose to block specific numbers, or toggle the aforementioned categories. There are actually several automated options here: Scam or Fraud, Suspected Spam, Hidden numbers, International Numbers, and Not in my Contacts. You can control each of these as needed.

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Alternatively, you can just tap the “Numbers on my block list” option to add specific numbers. Just tap the plus sign in the bottom right to open the blocking menu. You can choose from a few different options: a number, a contact, numbers that begin with specific digits, or recent calls or texts. That’s crazy-granular control. You can block an entire area code if you want!

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When someone on your block list tries to call (regardless of you entered the number manually or it’s part of the auto-blocking feature), the phone will ring for about half a second or so before Mr. Number can kick in. Once it does, however, it’ll send the caller to voicemail and leave a notification letting you know that it blocked a number. You can then tap the notification to read more information about the number, including comments left by other users as to what the nature of the call was. Neat, right?

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Block Calls with Google Voice

If you’re a Google Voice user, you have the ability to block calls from your Google Voice settings. Google Voice will play a message saying the number has been disconnected, so this may even fool telemarketers and other annoying callers into removing you from their spam lists.

Just log in to your Google Voice account online, locate the recent caller you want to block, click the More link, and select Block caller.

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See if Your Carrier Can Help

Carriers have the ability to block calls, but they often don’t make it easy. Like almost every other service they offer, it will probably cost you additional money. Some carriers may help you block calls if you contact them, some may direct you to their paid services, and some may say it isn’t possible. This all varies from carrier to carrier, so you’ll need to check your carrier’s website, or call them and ask what services they offer.


Spam calls are annoying and intrusive, not to mention they waste your time. Fraudulent calls can be scary—oftentimes they sound really official, which can lead unknowing users to actually turn over personal data (or worse!). Fortunately, there are solutions across the board—whether you want to keep spammers at bay or block your ex from blowing your phone up (metaphorically, not literally; unfortunately there’s not an app for that).

Cameron Summerson is a self-made geek, Android enthusiast, horror movie fanatic, metalhead, and cyclist. When he's not pounding keys on the 'net, you can find him spending time with his wife and kids, chugging away on the 6-string, spinning on the streets, or watching The Texas Chainsaw Massacre.

  • Published 05/25/16