safe mode

How to use Galaxy S20 recovery mode?

By simon Leave a Comment Last Modified: January 10, 2021 · Published on: December 19, 2020

Galaxy S20 recovery mode allows you to access some very special and advanced features to manage, hack and reset Galaxy S20.

This Galaxy S20 guide explains what Galaxy S20 recovery mode is, when you need to use it, how to reboot into the recovery mode, and how to navigate and exit the recovery mode.

The Galaxy S20 recovery mode is identical on all 4 Galaxy S20 modes: Galaxy S20, S20+, S20 FE, and S20 Ultra. So this guide applies to all these phones.

What is Galaxy S20 recovery mode?

All Android phones and tablets come with a recovery mode. Galaxy S20 is not an exception. Android vendors may add or remove some features in the recovery mode.

On Galaxy S20, you can use the recovery mode to (as shown in the picture below):

Wipe cache partition. This would wipe the cache partition to refresh apps without affecting your data on Galaxy S20.
Reset (factory data reset) Galaxy S20. Some geeks may refer this to “wipe” the phone. You can erase all your data and return the phone to factory state. But it does not rollback the Android version or any updates.
Update Galaxy S20 from ADB. If you want to sideload the update from your PC, you can do it using ADB. For example, you may manually update Galaxy S20 to Android 11 if you want
Update Galaxy S20 from the micro SD card. You can also apply updates saved in the micro SD card.
Reboot into bootloader (download mode). It allows you to enter download mode. For example, you want to install third-party recovery.
Mount /system partition. It is supposed to let you edit and correct some errors in the system partition without rooting. But it seems it is not working.
Run graphics test. It simply shows how the graphics (UI) like when the phone in different states, e.g., erasing, updating, optimizing apps. It has nothing to do with GPU or display.
View recovery logs.
Run locale test. Check the locale on the phone.
Repair apps. This allows you to manually optimise apps (rebuild app cache and data cache).
Power off Galaxy S20.

We will explain some of them later on.

When do you need to use Galaxy S20 recovery mode?

Galaxy S20 recovery mode is NOT designed for normal users. Most Galaxy S20 owners … Read the rest

How to enter, use, and exit Galaxy S20 safe mode?

By simon Leave a Comment Last Modified: January 9, 2021 · Published on: August 9, 2020

Galaxy S20 safe mode allows you to temporally turn off third-party apps and services so that you can debug some weird issues on Galaxy S20.

This Galaxy S20 guide explains what Galaxy S20 safe mode is, how to enter the Galaxy S20 safe mode, use the safe mode, and exit the safe mode on Galaxy S20.

Because the safe mode is one of the standard Android features, this guide applies to not only Galaxy S20 models (Galaxy S20, S20+, S20FE, and S20 Ultra) but also other Android phones including Galaxy S10, Galaxy Note 10, Galaxy S9, and many others.

What is Galaxy S20 safe mode?

Galaxy S20 safe mode is a special mode with all third-party (non-preinstalled) apps and services suspended temporally. All system settings and pre-installed app settings and data can be used normally.

So, safe mode does not reset your Galaxy S20 to the factory state. And therefore, it is “safe” for your data.

Of course, the real meaning of “safe” is that your Galaxy S20 is shielded from any third-party apps and services.

Under Galaxy S20 safe mode, you can figure out whether some weird issues are caused by any third-party apps, or pre-installed apps (and system settings). Normally, you should try safe mode before trying to wiping the cache partition in the Galaxy S20 recovery mode.

Safe mode is a built-in feature of Android. You can actually find it in almost all Android devices. And it works almost identically on all Android devices.

In a nutshell, Galaxy S20 safe mode allows you to check whether a problem is caused by third-party apps or services installed by you, or caused by system and pre-installed apps.

How to boot into Galaxy S20 safe mode?

There are at least two ways to boot the phone into Galaxy S20 safe mode.

Method 1: Use the Power Button menu (safe method)

This method works if your Galaxy S20 can still boot up to at least the lock screen.

Step 1: Hold the side key to access the Power-off menu

After the phone is booted to Galaxy S20 lock screen, or to Home screen, you can hold the side key (as illustrated below) for about 2-3 seconds, to call out the power-off menu (aka power menu, power button options).

Please note, as explained in the Galaxy S20 Layout page, Samsung moved the side key to … Read the rest

How to power on, power off, and restart Galaxy S20?

By simon Leave a Comment Last Modified: January 9, 2021 · Published on: May 25, 2020

You need to power on, power off, or restart (reboot) Galaxy S20 from time to time when using the phone.

Although it is usually a simple task to turn on or turn off Galaxy S20, it can be frustrating, especially when the phone hangs and you need to use Galaxy S20 urgently.

This Galaxy S20 guide shows you how to power on (turn on), power off (turn off), and restart (reboot) Galaxy S20, even when the phone hangs (non-responsive).

The guide applies to all three models of Galaxy S20: Galaxy S20, Galaxy S20+, and Galaxy S20 Ultra.

Power on Galaxy S20 (turn on, power up)

When the phone is off, you can hold the Side key (see Galaxy S20 layout) to power on (turn on) Galaxy S20 normally.

Please note, Samsung combined the old Power key with the unpopular Bixby key as the Galaxy S20 Side key.

As shown in the Galaxy S20 layout, the Side key is located on the right side of the phone, below the volume key. There is no physical keys or buttons on the left side any more.

Please note, if you hold volume buttons and the Side key, then you may:

Boot into Galaxy S20 recovery mode if you hold volume up button and the Side key.
Boot into Galaxy S20 download mode if you hold volume down and the Side Key.
Boot into Galaxy S20 safe mode if you hold the side Key, release the Side key and hold volume down key when you see Samsung logo.

Power off Galaxy S20 (turn off)

There is no hardware button (key) to power off Galaxy S20. If you hold the Side key, Galaxy S20 will reboot (restart), instead of powering off the phone. But sometimes, you need to power off Galaxy S20, e.g., when you enter a restricted area, or when you want to boot into Galaxy S20 recovery mode.

To power off Galaxy S20 gracefully, you need to use the software Power off button, which can be accessed in various locations on Galaxy S20.

Please note, if you power off Galaxy S20, you cannot receive calls from the phone. Text messages (SMS) will be saved by your carrier and delivered to the phone after you power on the phone and connect to the mobile network. You may check this guide on how to use SIM cards on Galaxy S20.

Galaxy

… Read the rest

How to remap and use Galaxy S20 Side key?

By simon Leave a Comment Last Modified: December 19, 2020 · Published on: March 10, 2020

Galaxy S20 Side key is a combination of traditional Power key and Bixby key. You can remap it to different functions.

This Galaxy S20 guide explains the functions of the Galaxy S20 Side key, how to remap the functions to different gestures and how to use the side key on Galaxy S20, S20+, and S20 Ultra.

This guide applies to all three models of Galaxy S20.

What is Galaxy S20 Side key?

Samsung introduced the Bixby key on Galaxy S8. It was located below the volume keys on the left side of the phone as explained in Galaxy S8 layout.

This configuration was maintained in Galaxy Note 8, S9, Note 9, and S10 with the hope of increasing adoption of Bixby services.

But unfortunately, it did not work well. Most owners do not use Bixby and don’t like the useless physical button.

Since Android Pie update, Samsung finally allows owners to remap the Bixby key to other functions. It becomes one of the most welcomed features in Android Pie update for Galaxy S9 and S8.

In Galaxy Note 10, Samsung eventually gave up the efforts of pushing Bixby key.

So, in Galaxy Note 10, Samsung combined the Power key and the Bixby key into one and named it Side key.

But Samsung put the new Side key in the left side of Galaxy Note 10. This created unnecessary confusions among the owners because the Power key of all previous Galaxy phones was on the right side.

So, in Galaxy S20, Samsung relocated the Side key into the right side (together with the Volume key) as explained in Galaxy S20 layout.

Essentially, Galaxy S20 Side key is still a combination of the Power key and the Bixby key. And the owner can customize the functions.

What are the gestures supported by Galaxy S20 Side key?

As a hardware button, Galaxy S20 Side key supports 4 gestures:

Single press.
Double press. The default function is Galaxy S20 camera quick launch.
Long press (press and hold for more than 2 seconds). The default function is the revamped Power Off menu.

The first gesture (single press) is not customizable. It is reserved for wake up/turn off the screen, just like what the old Power key does. You can also configure it to lock Galaxy S20 instantly as explained in Galaxy S20 lock screen settings.… Read the rest

Galaxy S20 layout

By simon Leave a Comment Last Modified: December 19, 2020 · Published on: February 29, 2020

You need to know the Galaxy S20 layout if you want to use Galaxy S20, S20+, or S20 Ultra properly.

This Galaxy S20 guide shows each part of Galaxy S20 layout and explains to you the functions of these parts on Samsung Galaxy S20, S20+, and S20 Ultra.

The layout of Galaxy S20, Galaxy S20+, and Galaxy S20 Ultra is almost identical, although the 3 models differ significantly in size and camera features (as explained in this page).

So, this guide applies to the layout of Galaxy S10, S20+, and S20 Ultra. In the text, we use the Galaxy S20 layout refers to all of these 3 models.

Why do you need to know about Galaxy S20 layout?

After unboxing Galaxy S20, the first thing you want to do is powering on the phone.

But where is the power button? If you are an owner of Galaxy Note 10 (or Note 10+), then you may find the power button (side key) is not relocated back to the right.

If you want to record an audio clip (especially in the interview mode), you probably need to know the location of the two microphones.

If you want to use NFC, use wireless charging, or use wireless PowerShare, you need to know the location of antennas and coils.

If you are new to the in-display fingerprint sensor, you need to know where to put your fingers on.

Anyway, all Galaxy S20 owners need to know the layout of Galaxy S20, S20+, and S20 Ultra so that you can use the phone effectively.

Galaxy S20 layout

In the picture below, 15 items of the Galaxy S20 layout are illustrated.

Front view

On the front of Galaxy S20, S20+, and S20 Ultra, you can find the main display (screen), in-display fingerprint reader, and the front camera.

#1. The screen

About 90% of the front part of Galaxy S20 is what Samsung called “Dynamic AMOLED 2X” screen.

It is actually just a new iteration of Samsung’s Super AMOLED. By default, the colour is vivid and sharp, but oversaturated.

Of course, you can change the default Vivid screen mode to Natural mode with more accurate colours.

Please note, the only screen difference of Galaxy S20, S20+, and S20 Ultra is the size. The technology, resolution and features are identical.

The Galaxy S20 touchscreen gestures were explained in this page.

Galaxy S20 navigation buttons… Read the rest