Have you ever blocked a number in a hurry, only to realize later you need to talk to that person again? Learning how to unblock a number can fix that fast. This guide shows you easy ways to do it on different phones and services. We cover iPhones, Androids like Google and Samsung, big carriers such as AT&T, Verizon, and T-Mobile, and even landlines. With spam calls rising – up to 2.56 billion a month in the US as of late 2025 – many people block numbers to stay safe. But sometimes, you block the wrong one by mistake. Don’t worry; unblocking is quick and simple.

The History of Call Blocking and Why It Matters

Call blocking started in the 1990s with basic features on landlines. By the 2000s, mobile phones added ways to block calls as spam grew. Laws like the Do Not Call Registry in 2003 helped, but tech like Caller ID spoofing made things harder. In 2009, the Truth in Caller ID Act stopped fake numbers for fraud. Now, in 2026, tools like SHAKEN/STIR check caller IDs to fight robocalls. Blocking helps protect from scams, which jumped 20% last year, hitting a six-year high. But unblocking lets you connect again without hassle.

Unblocking is key when you change your mind. Maybe it’s a friend you argued with, or a work contact you blocked by error. Stats show one-third of Americans get a scam call daily, so blocking is common. Yet, knowing how to unblock a number keeps your phone flexible. We drew from top guides to make this clear, like those on knowing if you’re blocked or blocking spam. For more on spotting blocks, check how to know if someone blocked you.

Why You Might Need to Unblock a Number

People block numbers for many reasons: to stop spam, avoid ex-friends, or cut off telemarketers. But life changes. You might unblock to:

• Fix a mistake, like blocking a family member.
• Reconnect after a fight.
• Allow calls from a new job or service. Common issues include not seeing missed calls from blocked numbers or confusing blocks with phone problems. Always check your blocked list first.

How to Unblock a Number on iPhone

iPhones make unblocking easy through settings. Apple added better blocking in iOS 7, and now in iOS 19, it’s even smoother with privacy tools.

Steps to unblock:

1. Open Settings. Go to the app with the gear icon.
2. Tap Phone. Scroll down and pick it.
3. Choose Blocked Contacts. It’s under Call Blocking & Identification.
4. Find the number. Swipe left on it.
5. Tap Unblock. Confirm if asked.

You can also unblock from Contacts: Open Contacts, tap the name, scroll to the bottom, and tap Unblock this Caller.

If you use Silence Unknown Callers, turn it off in Settings > Phone to allow more calls. Remember, unblocked numbers can call or text right away. If it’s spam, learn more from Avast’s spam blocking guide.

How to Unblock a Number on Android

Android varies by maker, but Google’s Phone app is standard. Since Android 6, blocking is built-in.

General steps for Google Phone app:

1. Open Phone app. It’s the green icon with a handset.
2. Tap More (three dots). Top right.
3. Go to Settings > Blocked numbers.
4. Find the number. Tap the X or Clear next to it.
5. Tap Unblock. Done.

For Google Fi: Log into the app or site, go to Privacy & security, then Block phone numbers, and remove.

See Google’s official help for details: Block or unblock a phone number.

How to Unblock a Number on Samsung Phones

Samsung uses One UI, with extra features like Smart Call.

Steps:

1. Open Phone app.
2. Tap More (three dots) > Settings.
3. Tap Block numbers.
4. Find the number. Tap the minus (-) icon.
5. Confirm unblock.

From Contacts: Tap the contact, More, Unblock contact.

Samsung phones block over 1 billion spam calls yearly with built-in tools. If you need business advice, head to Business to Mark.

Unblocking on Major Carriers

Carriers offer extra blocking via apps or codes.

AT&T

Use the AT&T app or phone settings.

1. Open Phone app > Menu > Settings > Blocked numbers.
2. Tap X next to number > Unblock.

For ActiveArmor: Log in, manage blocks.

Verizon

Via My Verizon app or site.

1. Log in to My Verizon.
2. Go to Account > My plan > Blocks.
3. Select line > Block calls & messages.
4. Unblock under Currently blocked.

Verizon’s Call Filter blocks millions of scams daily.

T-Mobile

Use the app or device.

1. Open Phone > Settings > Blocked numbers.
2. Tap cross or hold > Unblock.

For Scam Shield: Manage in app.

How to Unblock a Number on Landline

Landlines use codes or devices.

1. *Pick up phone, dial 82 to unhide your ID if needed.
2. *For blocks: Dial 87 to deactivate last caller block.
3. Check device menu for block list, delete number.

For AT&T cordless: Press Call Block, review list, delete.

Common Mistakes to Avoid

• Not verifying the number: Always double-check before unblock.
• Forgetting to update apps: Restart phone after.
• Ignoring carrier blocks: Check both device and carrier.

Tips for Managing Blocked Numbers

• Review list monthly.
• Use apps like Truecaller for smart blocking.
• Report spam to FTC.
• Turn on unknown caller silence.
• Back up contacts before changes.

FAQs

How do I know if a number is blocked? Calls go straight to voicemail, no ring.

Can I unblock on social media too? Yes, but this guide focuses on phones. For apps like WhatsApp, go to settings.

What if unblocking doesn’t work? Restart device or contact carrier.

How to unblock a number on other devices? Similar steps; check maker’s site.

Conclusion

Mastering how to unblock a number keeps your phone under control. From iPhones to landlines, the steps are straightforward. With spam at record highs – 420 million more calls monthly – smart management is key. Follow these guides, avoid mistakes, and stay connected. Have you unblocked a number lately? What was your reason?

References

1. How to Know If Someone Blocked You – Guide on signs of being blocked, useful for understanding blocks.
2. Avast Spam Calls Guide – Details on blocking spam, including unblocking methods for context.
3. Google Phone App Support – Official steps for Android unblocking.