Samsung Galaxy running slow? 6 fixes

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

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. 

   Tap Optimize now

   Settings, Device care. The top card rates the phone and offers Optimize now, which closes background apps and frees memory. Ours said Good.

   Done

2. 

   Free up storage

   Storage shows how full the phone is. A nearly full phone slows down; tap Storage to find large files and unused apps. Ours was 24% used.

   Done

3. 

   Check Memory

   Memory shows how much RAM is in use. Tap it to close apps you are not using.

   Done

4. 

   Turn on Auto restart

   Device care, Auto optimization. Auto restart can restart the phone when it detects performance problems, or on a schedule.

   Done

5. 

   Install software updates

   Software update is on the same page. Updates fix bugs that slow the phone down. Ours had last checked on October 4, 2026.

   Done

6. Restart the phone

   A restart clears apps that hang in the background.

   Done

About this guide

A Galaxy that feels slow usually has too little free storage, too many apps running, or has not restarted for a long time. Device care shows all three on one page.

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.

Good to know

Storage full? how to check and free up storage on a Samsung Galaxy phone.

Phone restarting by itself? Samsung Galaxy keeps restarting? 7 things to check.

Only typing is slow? Samsung Keyboard lagging? 6 fixes.

In short: Device care: Optimize now, free storage, close apps under Memory, Auto restart on, update, restart.