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    • Android 12 update vs One UI 4.0 vs One UI 4.1: update Galaxy S21, S20 and S10 to Android 12
      • Top 12 new features in Android 12 update for Galaxy S21, S20 and S10
      • How to use Extra Dim on Galaxy S22, S21, S20, and S10? How to use Extra Dim on Galaxy S22, S21, S20, and S10?
      • Should I enable Protect Battery to limit the maximum battery charge to 85% on Galaxy S22, S21, S20, and S10?
      • Do You Need to Enable the Suspend Execution for Cached Apps on Galaxy S22 or Galaxy S21, S20, and S10 with Android 12 update?
      • How to Automatically Convert a Photo to a Time-lapse video with Scene Relighting on Galaxy S22, S21, S20, and S10?
      • A complete guide for Writing Assistant on Samsung Keyboard on Galaxy S22, S21, S20 and S10 (with Android 12)
    • How to charge Galaxy S21 battery properly?
    • Ultimate Guide for Using SIM Card on Galaxy S21
    • Master Meaning of Galaxy S21 Status Icons and Notification Icons
    • Layout of Galaxy S21, S21+, and S21 Ultra
      • How to Use and Customize Galaxy S21 Side Key?
      • How to use Galaxy S21 quick settings panel?
      • How to use touchscreen gestures on Galaxy S21?
      • How to power on, power off, and reboot Galaxy S21,even when the phone hangs?
      • How to migrate to Galaxy S21 with Samsung Smart Switch?
    • Understand and Use Galaxy S21 Lock Screen
      • How to lock Galaxy S21 screen?
      • Master Galaxy S21 Lock Screen Settings
    • How to Use Galaxy S21 Home Screen?
      • How to use widgets on Galaxy S21?
      • How to Customize Galaxy S21 Home Screen?
      • How to use LED icon editor to customize LED icons for Smart LED View Cover and LED Back Cover?
    • How to use and customize Galaxy S21 navigation buttons and navigation bar?
      • How to use navigation gestures on Galaxy S21?
      • How to use NavStar (Good Lock) to customize navigation buttons and navigation bar on Samsung Galaxy phones?
  • New Features
    • Top 13 new features in One UI 5 update (Android 13 update) for Galaxy S22, S21, and S20
    • Android 12 update vs One UI 4.0 vs One UI 4.1: update Galaxy S21, S20 and S10 to Android 12
    • Master Google Discover and Samsung Free on Galaxy S21
    • Top 6 disappointments of Galaxy S21 Ultra
    • Galaxy S21 vs Galaxy S21+ vs Galaxy S21 Ultra
  • Camera
    • How to use Galaxy S21 Camera App?
    • How to Use Galaxy S21 Camera Modes?
    • Ultimate Guide for Galaxy S21 Camera Settings
    • How to use Galaxy S21 camera quick launch?
    • How to set and resize photo size on Samsung Galaxy S21, S20, S10, and S9 without using any third-party apps?
  • Accessories
    • How to use Galaxy S21 Smart Clear View Cover (S-View Flip Cover)?
    • How to Use Galaxy S21 Smart LED View Cover (LED Wallet Cover)?
    • How to use LED icon editor to customize LED icons for Smart LED View Cover and LED Back Cover?
  • User Manual
Samsung Galaxy S21 Guides

Samsung Galaxy S21 Guides

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Master Galaxy S21 Lock Screen Settings

Last updated on: September 26, 2022

Master Galaxy S21 Lock Screen SettingsUnderstanding the Galaxy S21 lock screen settings helps you secure the phone and improve your productivity. You can also customize the locks screen as you want after mastering the Galaxy S21 lock screen settings.

This Galaxy S21 guide explains all items on the Galaxy S21 lock screen settings page. Typical usage of some settings is also illustrated and demonstrated.

This guide applies all Galaxy S21 models (Galaxy S21, Galaxy S21+, and Galaxy S21 Ultra).

How to access Galaxy lock screen settings?

Galaxy S21 lock screen settings page is a sub-page of Galaxy S21 Settings.

There are a few different ways to access Galaxy S21 Settings, for example:

  • Tap the Settings app icon on the Galaxy S21 Home screen or Apps screen
  • Tap the Gear icon on the Galaxy S21 Quick Settings panel (or notifications panel).
  • Use voice commands (e.g., Google Assistant or Bixby).

Once on the Galaxy S21 Settings page, as shown below, tap the Lock screen to access the Galaxy S21 lock screen settings page.

Galaxy S21 Settings

What is included on Galaxy S21 lock screen settings?

As shown in the screenshot below, the following 11 items on the Galaxy S21 lock screen settings page are included:

  1. Screen lock type.
  2. Smart lock.
… Read the rest

How to Use and Customize Galaxy S21 Side Key?

Last updated on: September 21, 2021

 Use and Customize Galaxy S21 Side KeyGalaxy S21 Side key is more than a power button (key) on Galaxy S21, and you can also customize some features of the Galaxy S21 Side key.

This Galaxy S21 guide explains what the Galaxy S21 Side key is, the functions of this key/button, and how to use and customize the Side key on the Galaxy S21, S21+, and S21 Ultra.

What is Galaxy S21 Side Key?

Since Galaxy S20, Samsung ditched the unpopular Bixby and combined the Bixby key with the power key into the Side key.

As shown in the Galaxy S21 layout, the Side key is located on the right side of the phone and below the volume rockers. Please note, Samsung relocated the volume keys from the left side (as in all previous Galaxy S devices) to the sight side since Galaxy S20.

In a nutshell, the Galaxy S21 Side key is a combination of the traditional power key and the notorious Bixby key.

When the phone is powered off, the Galaxy S21Side key will be just the power key.  The added functions are available only after the phone is powered up.

Functions of Galaxy S21 Side Key

As mentioned, the functions of … Read the rest

How to power on, power off, and reboot Galaxy S21,even when the phone hangs?

Last updated on: October 15, 2021

power on, power off, and reboot Galaxy S21,even when the phone hangsYou need to power on, power off, or reboot Galaxy S21 once in a while. Sometimes, you may have to reboot Galaxy S21 without accessing the power-off menu if the phone hangs.

This Galaxy S21 how-to guide explains how to power on, power off, and reboot Galaxy S21 even if the phone hangs and how to access the power-off menu.

In this guide, Galaxy S21 refers to all Galaxy S21 models, including Galaxy S21, S21+, and S21 Ultra. The features discussed in this guide are common on all these Galaxy S21 phones.

Why and when do you need to power on, power off, and reboot Galaxy S21?

To set up Galaxy S21 or migrate from an old phone to Galaxy S21, you have to power on the phone first.

It is a dead brick when it is powered off. So, you need to keep it on if you want to use your Galaxy S21.

Sometimes, you may need to power off Galaxy S21. For example, when you enter some sensitive locations, you may be asked to power off the phone and lock it in the locker.  On the aeroplane, during taxing and landing, normally, you are asked to power … Read the rest

Master Meaning of Galaxy S21 Status Icons and Notification Icons

Last updated on: May 15, 2022

Meaning of Galaxy S21 Status Icons and Notification IconsYou need to understand the meaning of Galaxy S21 status icons and notification icons to use the phone properly and effectively.  Galaxy S21 status icons and notification icons can tell you rich information about the status of the phone status, phone health, and notification from individual apps.

This Galaxy S21 how-to guide first explains the differences between Galaxy S21 status icons and notification icons, then explains the meaning of Galaxy S21 status icons and notification icons you may find in Galaxy S21, S21+, and S21 Ultra.

Because Samsung uses slightly different icons in different regions or for some carriers, you may get Galaxy S21 status icons and notification icons that are different from those shown in this guide. This is normal. If you cannot figure out the meaning of those icons, you may share the screenshot on our FaceBook page so that the community can help you identify them.

Update: Android 12 update for Galaxy S21 (S20 and S10) brought a new camera and microphone indicators icon when the camera or microphone is accessed.

What is the difference between Galaxy S21 status icons and notification icons?

Like all other Android phones,  Galaxy S21 use the top part of the screen … Read the rest

Ultimate Guide for Using SIM Card on Galaxy S21

Last updated on: July 3, 2021

SIM Card on Galaxy S21You need to use a SIM card on Galaxy S21 if you want to use mobile data, receive SMS, or make voice calls through a cellular network.

This Galaxy S21 how-to guide explains everything you need to know about using a SIM card on Galaxy S21: the supported SIM card size, eSIM support, insert or change SIM cards, use two SIM cards, and check SIM card status on Galaxy S21.

This guide applies to all three Galaxy S21 models (Galaxy S21, S21+, and S21 Ultra). But in different regions or on different carriers, the mobile network features may slightly different.

What’s the supported SIM card size for Galaxy S21?

Galaxy S21 supports nano-SIM cards only (for the physical card) and eSIM (if your carrier supports it).

A nano-SIM is currently the smallest SIM card for mobile phones. Most phones released in the last few years adopted nano-SIM already.

So, you can use your existing SIM card if you migrated to Galaxy S21 from the following phones (just some examples):

  • Samsung Galaxy S6, S7, S8, S9, S10, S20 and all their variants.
  • Samsung Galaxy Note 5,  Note 7 FE, Note 8, Note 9, Note 10, Note 10+, Note 10 Lite, Note
… Read the rest

Layout of Galaxy S21, S21+, and S21 Ultra

Last updated on: June 4, 2022

Layout of Galaxy S21, S21+, and S21 UltraYou need to know the layout of Galaxy S21, S21+ or S21 Ultra to locate and use the buttons, ports, and key components properly.

This Galaxy S21 how-to guide explains everything you need to know on the layout of S21, S21+ or S21 Ultra. The name and function of each button, port, and components are illustrated in the front view and rear view of the three phones.

Why you should know the layout of Galaxy S21, S21+, and S21 Ultra?

You need to know your phone before using it.  It is simple.

If you do not know where the SIM card slot is located, you may try hard to pierce the microphone at the bottom of Galaxy S21.

Or if you are a seasoned Galaxy S phone user, you may assume the SIM card slot on Galaxy S21 is on the top and therefore, pierce another microphone at the top.

Of course, you need to know the location of the Side key to power on or off Galaxy S21,  or the volume key to change the volume when playing media.

Besides, Galaxy S21( all three models) uses the in-display ultrasonic fingerprint reader (BTW, this is one of the … Read the rest

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Samsung Galaxy S21 how-to guides, user manuals, tips and tricks for Samsung Galaxy S21, Galaxy S21+, Galaxy S21 FE and Galaxy S21 Ultra owners.
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