Tired of spam calls on your iPhone? You and most other US iPhone users alike. Apple actually has solid built-in tools to block calls. iOS 18 added Silence Unknown Callers and improved spam detection. Combined with carrier spam filters and third-party apps, you can cut spam calls dramatically without much effort.
Here is how to use the tools that actually work, from quick fixes to deeper spam protection.
Blocking a Specific Number
For one-off spam calls, blocking individual numbers is the quickest fix. Open the Phone app and tap Recents. Find the number you want to block. Tap the small i icon next to it to open the call details.
Scroll down and tap Block this Caller. Confirm. The number gets added to your block list. Calls, texts and FaceTime from that number are all blocked silently. The caller hears your normal voicemail greeting if they call again, with no indication they have been blocked.
Blocking from Contacts
If you want to block someone already in your contacts, the path is slightly different. Open Contacts and tap the contact you want to block. Scroll to the bottom of the contact card. Tap Block this Caller. Confirm.
Silence Unknown Callers
This is the secret weapon against spam call volume. When turned on, iPhone silences calls from anyone not in your contacts. Settings > Apps > Phone > Silence Unknown Callers. Turn it on.
Unknown numbers now go straight to voicemail without ringing your phone. The calls still show up in Recents so you can call back legitimate ones like a delivery driver or doctor’s office that left a message. Spam callers rarely leave voicemails so they end up filtered out of your day completely.
Managing Your Block List
To see and manage all blocked numbers, go to Settings > Apps > Phone > Blocked Contacts. The full list shows up. Swipe left on a number to unblock it. Tap Edit at the top to manage multiple blocks at once. Review this list every few months because you might block numbers you actually wanted to keep.
Use Your Carrier’s Spam Filter
All major US carriers have free spam filtering apps that block calls before they even reach your iPhone. These catch a lot more than Apple’s built-in filtering because carriers have network-level data.
- AT&T customers should install the AT&T Active Armor app.
- Verizon customers should install the Verizon Call Filter app.
- T-Mobile customers should install the Scam Shield app.
- For smaller carriers (Cricket, Metro, Boost), check their app store offerings since many use the same backend.
- Spectrum Mobile and Xfinity Mobile use their parent carrier’s tools (T-Mobile and Verizon respectively).
Install your carrier’s free app and turn on aggressive spam blocking. The combination of carrier filter plus iPhone Silence Unknown Callers cuts most spam calls.
Third-Party Spam Blocker Apps
For heavy spam volume, third-party apps go beyond what Apple and carriers offer. The major options each have strengths worth knowing about.
Robokiller at $39.99/year has strong spam protection and includes answer bots that waste scammers’ time. Truecaller is free with a big crowdsourced database of known spam numbers. Hiya offers real-time caller ID and spam blocking with both free and paid tiers. For people who get 20+ spam calls daily, these apps are worth the small monthly cost.
Reporting Spam to Apple
Reporting spam helps Apple improve future detection for everyone. The process is quick and worth doing. In Recents, tap the i next to the spam number. Tap Report Junk. The number gets shared with Apple to improve iOS spam detection over time. Take 5 seconds and report any spam that gets through.
Block at the National Level
The US National Do Not Call registry at donotcall.gov adds you to a list that legitimate telemarketers must respect. Registration takes 30 seconds and is free. It reduces calls from legitimate telemarketers, charities and political campaigns that follow the rules.
The list does not stop scammers because they ignore the rules anyway. But it cuts the legitimate telemarketing volume meaningfully. Combined with other methods, the National DNC list adds another layer of reduction.
When to Use Each Method
Different spam patterns need different solutions. The right combination depends on what kind of spam you actually get.
For one specific person you want to block, use Method 1 (block from Recents) or Method 2 (block from Contacts). For mass spam call problems, use Method 3 (Silence Unknown Callers). For best filtering with no ongoing effort, use Method 5 (carrier app). For robocall-heavy situations where everything else fails, use Method 6 (Robokiller or Hiya). Most users benefit from running 2-3 methods together rather than relying on just one.
Final Thoughts
To block calls on iPhone, use the i icon in Recents for individual numbers and Silence Unknown Callers for spam volume. Add your carrier’s free app for extra coverage. For heavy robocalls, Robokiller or Hiya are worth the small monthly cost. Most spam stops with these combined steps. The combination beats any single tool used alone.
If you found a combo that works well, share it in the comments.