How to block numbers and spam calls on a Samsung Galaxy

By Saadat Rafiq · 2 min read · 6 steps · Updated 5 October 2026

Device

Android

Shown on

Samsung Galaxy A57 5G (SM-A576B), One UI 8.5, Android 16

App

Settings

Real screenshots

5 of 6 steps

Checked

October 2026

Sources

1 official, linked below

Step by step

1. Open the Phone app settings

   Open the Phone app, tap the three dots (More options) and tap Settings.

   Done

2. 

   Tap Block numbers

   It is in the middle of Call settings.

   Done

3. 

   Add a number

   Type the number in Add phone number and tap +. Or tap Recents or Contacts and pick it from the list.

   Done

4. 

   Block unknown numbers

   Block calls from unknown numbers is meant for callers who hide their number. Switch it on if those calls bother you.

   Done

5. 

   Turn on Caller ID and spam protection

   Back in Call settings, tap Caller ID and spam protection. It uses Hiya to name unknown callers and can block spam and scam calls.

   Done

6. 

   Switch it on

   Tap the switch at the top. Then the Block spam and scam calls option becomes available.

   Done

About this guide

The Samsung Phone app has its own blocking page, separate from Google's Phone app. Blocked numbers cannot call you, and you get no notification when they try.

The screenshots are from a Samsung Galaxy A57 5G with One UI 8.5 and Android 16. Other Galaxy phones on One UI 8 use the same menus; on older One UI versions a few names and positions differ. We only looked at these screens on our phone and changed nothing. Both blocking switches were off on our phone.

Good to know

Spam that still gets through can be blocked one by one: open the call in Recents and block the number from there.

In short: Phone, More options, Settings, Block numbers: add the number. Caller ID and spam protection for spam.