How to block spam calls on iPhone and Pixel (Silence Unknown Callers vs Call Screen)

How to Block Spam Calls on iPhone and Pixel (Silence Unknown Callers vs Call Screen)

Spam calls are a persistent nuisance for smartphone users, disrupting daily life and sometimes even leading to scams. Both iPhone and Google Pixel offer built-in features to help you block or reduce these unwanted calls, but they approach the problem differently. This article explains how to block spam calls on iPhone and Pixel, with a focus on comparing Silence Unknown Callers on iPhone and Call Screen on Pixel, so you can decide which method works best for you.

Understanding Spam Calls

Before diving into solutions, it’s important to know what spam calls are. These are typically unsolicited calls from telemarketers, scammers, robocalls, or unknown numbers trying to sell you something or trick you into sharing personal information. Blocking or screening these calls can save you time and frustration.

Blocking Spam Calls on iPhone

1. Silence Unknown Callers

Silence Unknown Callers is a straightforward feature designed to send calls from unknown numbers directly to voicemail, without your phone ringing.

What it does: Any call from a number not in your Contacts, recent outgoing calls, or Siri Suggestions goes straight to voicemail. The call still shows in your Recents list, so you won’t miss legitimate messages.
How to enable:
- Open Settings
- Tap Phone
- Find and toggle on Silence Unknown Callers

Benefits:

Simple and effective at stopping most spam calls from ringing your phone.
No apps or third-party services needed.
Doesn’t block calls — it just silences those you don’t recognize, keeping you in control.

Drawbacks:

You might miss calls from legitimate unknown numbers (like doctors, delivery services, or new contacts).
There’s no real-time screening or filtering of calls aside from the whitelisting rule (contacts and recent calls).

2. Blocking Specific Numbers

In addition to silencing unknown callers, you can block specific spam numbers by:

Going to the Phone app
Tapping the info icon next to the unwanted number in your Recents
Scrolling down and tapping Block this Caller

This method is manual and works well primarily if you receive repeated calls from the same spam numbers.

3. Use Third-Party Spam Blockers (Optional)

If you want more control, the iPhone supports third-party spam-blocking apps that can identify likely spam calls and block them automatically. These apps use databases of known spam numbers and can integrate with the Phone app via the Call Blocking & Identification feature in Settings.

Blocking Spam Calls on Pixel

1. Call Screen

Call Screen is Google Pixel’s signature feature for dealing with unwanted calls.

What it does: When you receive a call from an unknown or suspected spam number, your phone answers it with an automated Google Assistant voice. The Assistant asks who’s calling and why, transcribing the caller’s answers in real-time on your screen so you can decide whether to pick up, decline, or mark as spam.
How to enable:
- Open the Phone app
- Tap Settings
- Select Spam and Call Screen
- Turn on Call Screen
- You can choose to have Call Screen activate for all unknown numbers, suspected spam, or both.

Benefits:

Interactive and customizable screening lets you judge spam calls without answering.
Google Assistant transcribes and filters calls, providing context.
You can send quick replies or report calls as spam right from the Call Screen.
Helps avoid harassment or scams cleverly disguised as legitimate calls.

Drawbacks:

Uses some data and processing power for the screening.
May add a short delay before you hear the caller, which some users find intrusive.
Limited to Google Pixel devices and compatible phones in some regions.

2. Automatic Spam Protection

Pixel also allows you to turn on spam protection, which alerts you when an incoming call is likely spam.

Go to Phone app > Settings > Spam and Call Screen
Enable Filter spam calls

This doesn’t block calls automatically but warns you so you can decide how to respond.

3. Blocking Specific Numbers

Like iPhone, you can block individual numbers on Pixel:

In the Phone app, tap the number in your call history
Tap Block/report spam

Comparing Silence Unknown Callers and Call Screen

Feature	Silence Unknown Callers (iPhone)	Call Screen (Pixel)
Type of blocking	Silences unknown numbers (no ring)	Screens unknown/suspected numbers with Assistant
Interactivity	None — calls sent to voicemail silently	Interactive with transcription of call answers
Customization	Only known vs unknown callers	Various modes: all unknown, suspected spam, or both
User control over calls	Call goes to voicemail, you check voicemail later	View real-time transcript, decide to answer or block
Built-in spam warning	No	Yes, with spam filtering and alerts
Risk of missing important calls	Higher — legitimate unknown numbers get silenced	Lower — you can answer after screening
Requires additional app?	No	No

Which Should You Use?

If you want a hands-off, minimal setup way to stop unknown numbers from ringing, the iPhone’s Silence Unknown Callers is effective and simple.
If you prefer more control and want to interact with unknown callers before answering, Google Pixel’s Call Screen offers a smart, adaptive solution.
For both phones, combining built-in solutions with manual blocking of recurrent spam callers can enhance call protection.
Third-party spam blocking apps are an additional option, but the built-in features in both phones are powerful enough for many users.

Additional Tips to Reduce Spam Calls

Register your number with the Do Not Call list available in your country.
Avoid answering or interacting with unknown calls.
Don’t press numbers or give personal info if you suspect a scam.
Keep your phone software updated to ensure spam protection features work optimally.
Report spam numbers to your carrier if possible.

Summary

Both iPhone and Pixel offer solid tools to cut down on spam calls, but they use different approaches:

iPhone’s Silence Unknown Callers quietly sends unknown calls to voicemail.
Pixel’s Call Screen actively screens and transcribes unknown calls to help you decide on the spot.

Choosing the right feature depends on your preferences for convenience versus control. Understanding both will help you keep spam calls at bay and protect your peace of mind.