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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

fingerprint scanner

How to hide Galaxy S21 password and PIN when typing?

Last updated on: June 4, 2022

hide Galaxy S21 password and PIN when typingYou can hide Galaxy S21 password or PIN when you type them to unlock the phone. So, the prying eyes will only see dots instead of the actual characters.

This Galaxy S21 guide explains why you should hide Galaxy S21 password or PIN when typing and how to hide Galaxy S21 PIN and password when unlocking your phone or when you type them on any apps.

Although there are some differences among the three Galaxy S21 models, this security feature applies to all of them.

Why should you hide Galaxy S21 password and PIN when typing?

By default, when you type your password or PIN to unlock Galaxy S21, the phone displays the characters briefly (about 1-2 seconds) on the screen. The purpose of showing what you typed briefly is for you to check whether you typed them correctly.

But this can be a security threat to your data and accounts.

For example, if you unlock Galaxy S21 on public transport, prying eyes can easily see the password or PIN.  The security cameras in the lift or other locations may also “see” the password or PIN.

You may argue it does not matter because you are holding the phone. … Read the rest

How to lock Galaxy S21 screen?

Last updated on: September 26, 2022

set screen lock type to lock Galaxy S21 screenYou need to lock Galaxy S21 screen to protect your data and privacy. Just like that, you need to close the gate or door of your home.

This Galaxy S21 how-to guide explains why you must lock Galaxy S21 screen, available screen lock types on Galaxy S21 and how to use them. The guide also explains the relationship and differences among  PIN/password/password, smart lock, and biometric unlock (face or fingerprint).

This screen lock feature is identical on all three Galaxy S21 models. So, this guide applies to all of them (Galaxy S21, Galaxy S21+, and Galaxy S21 Ultra).

Why you MUST lock Galaxy S21 screen?

Screen Lock is a security feature on almost all smartphones. It is like the lock for your door.

Of course, the “door” of the phone is the Galaxy S21 lock screen.

So, the screen lock is actually a “lock” for the lock screen.

If you do not set up a screen lock for the door (lock screen), anyone who manages to get the phone can access all your messages, photos, call logs, apps, and even many data saved on the cloud.

Some Galaxy S21 owners may assume the phone will be held … Read the rest

How to use Galaxy S21 Smart Clear View Cover (S-View Flip Cover)?

Last updated on: September 26, 2022

How to use Galaxy S21 Smart Clear View Cover (S-View Flip Cover)Galaxy S21 Smart Clear View Cover (aka Galaxy S21 S-View Flip Cover in some regions) offers some unique features and decent protection for Galaxy S21. And it is “officially” designed and manufactured by Samsung.

This Galaxy S21 accessories guide explains the unique features and layout of the Galaxy S21 Smart Clear View Cover and demonstrates how to use the Galaxy S21 S-View Flip Cover, including attaching to or removing the cover from Galaxy S21 properly, adjusting the text orientation on the cover, accepting or rejecting calls without opening the cover, and controlling music play on the Galaxy S21 Smart Clear View Cover.

Due to the differences in size and camera lens in Galaxy S21, S21+, S21 Ultra, the Galaxy S21 Smart Clear View Cover is NOT interchangeable among these 3 phones. In other words, if your Galaxy S21 is a Galaxy S21+, you MUST buy the clear view cover for Galaxy S21+.  If it is Galaxy S21 Ultra, you need to buy the one for S21 Ultra.

What are the unique features of the Galaxy S21 Smart Clear View Cover (S-View Flip Cover)?

As an official Galaxy S21 accessory, compared to most third-party flip covers, Galaxy S21 Smart Clear … Read the rest

Understand and Use Galaxy S21 Lock Screen

Last updated on: November 27, 2023

Understand and Use Galaxy S21 Lock ScreenYou have to use the Galaxy S21 lock screen to secure your Galaxy S21 and control access to your phone and data.

This Galaxy S21 how-to guide explains the role of the Galaxy S21 lock screen, pages, layout and the meaning of each item on the Galaxy S21 lock screen, and how to use gestures on the lock screen.

The lock screen is identical on all Galaxy S21 phones (Galaxy S21, S21+, and S21 Ultra). So, this guide applies to all Galaxy S21 phones.

If you have updated your Galaxy S21 to Android 14 (One UI 6), you can reposition the clock on the lock screen.

The role of the Galaxy S21 lock screen

The lock screen is an essential part of a smartphone.  It is part of the security system of the phone.

You can think Galaxy S21 lock screen as the only entrance for your Galaxy S21. It is an analogy of the main door of your home.

Therefore, you need to secure the lock screen on Galaxy S21 so that only you can “unlock” it. You should set up a screen lock (PIN, password, or pattern) to lock down … 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

Top 6 disappointments of Galaxy S21 Ultra

Last updated on: September 26, 2022

Top 6 disappointments of Galaxy S21 UltraGalaxy S21 Ultra is Samsung’s only hope to reverse the declining sales of Galaxy S phones since Galaxy S10. But it seems Samsung lost the opportunity due to the numerous disappointments of Galaxy S21 Ultra.

This post summarizes the top 6 disappointments of Galaxy S21 Ultra: curved screen, no micro SD card support, lack of essential accessories, no 45W superfast charging,  with S Pen support but without an S Pen, inferior under-display fingerprint sensor.

Curved screen: the No.1 disappointment of Galaxy S21 Ultra

Since Galaxy S6 Edge (or even Galaxy Note Edge), Samsung tried hard to sell the curved screen.  It is unique.

But most Galaxy phone owners don’t like it.  Very few Galaxy phone owners bought the phone because of the curved screen.

Initially, Samsung told us they would add some new and innovative features like Edge screen. Now, it is purely cosmetic (infinity display).

If Samsung had listened to customers, they should have stopped using the curved screen on any mainstream phones 3 or 4 years ago.

Unfortunately, Samsung is too stubborn and try luck on the most important flagship phones.

On the three Galaxy S21 models, Galaxy S21 … 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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