You get superuser rights or get admin rights on HTC Desire 21s. This means that you can completely edit all system files that are not available to regular users. That is, you or any applications that work only on rooted devices will be able to access and change such system programs and chips, such as camera flash, flashlights for notifications, etc.

Advantages of Rooting Your HTC Desire 21s

Running special apps.

Remove Preinstalled Crapware.

You can transfer any application from internal memory to SD card.

Flash a Custom ROM.

You can boost your speed of Android device and the battery life.

Disadvantages of Rooting Your HTC Desire 21s

Voids the phone warranty.

You can turn your smartphone into a brick.

You can lost both performance speed and features.

Might Expose You to More Security Risks.

You will face difficulties while updating your phone after rooted your Android device.

How to Root HTC Desire 21s without Computer (KingoRoot apk for Android)

2. Install KingoRoot.apk on your device.
3. Launch "Kingo ROOT" app and start rooting.
4. Waiting for a few seconds.

Other Android Root Software without Computer

Framaroot
One-click rooting program for Android OS without using a PC, with a large list of supported devices.
KingRoot
The program supports over 40,000 firmwares.
Baidu Root
Rooting app with support for over 6000 Android device models.
Romaster SU
Great tool for rooting Samsung, HTC, Sony, Huawei, ZTE, Lenovo, CoolPad and other devices. Over 8000 models in total.
Universal AndRoot
A simple and very fast program for Android OS, for obtaining root-rights on various devices, without using a computer.
z4root
Another program for getting root rights on Android 2.1+ is Android 2.2.1.
GingerBreak
The program is designed to get root-rights on devices running Android OS 2.3 (Gingerbread), without using a PC.
VISIONary+
The program for obtaining root rights on Android 2.1+ - 2.2.1.
360 Root
This program will help you to root Android devices with version 2.2-4.2.
Towelroot
Root program from the famous hacker Geohot.
Root Tool
With the Root Tool, you can root your Android device with one click.
Root Dashi
This is the second most popular rooting app.
DingDong Root
An analogue of Baidu Root, but with some differences.
Poot
With this program, you can root on devices with a Qualcomm processor.
Root Genius
The mobile version of the well-known application for quickly obtaining root rights, in one click.
Baidu Super Root
An analogue of Baidu Root, only more convenient.
Root Zhushou
This is another one-click rooting app for your Android device.
PingPong Root
A program for obtaining root rights to Samsung Galaxy S6 and S6 Edge.
Universal Root
Gets root in a variety of non-standard ways.
OneClickRoot
It will help you to get root access easily and in a couple of clicks.
Root Master
A universal program that allows you to get root rights in one click.
Ct_hack root
Build several programs in one to successfully obtain root rights.

How to Root HTC Desire 21s with Computer

Before starting the rooting process, follow these steps.

1. Backup Your Android Device.
2. Make sure your battery is charged to 80%.
3. Make sure you know other data such as model number, kernel number, build number, etc.
4. Use the original USB cable.
5. Internet connection necessary.
6. Allow installation of apps from unknown sources. (Settings > Security > Unknown Sources)

Root Android via KingoRoot (PC Version)

1. Download and install KingoRoot Android (PC Version).
2. Launch Kingo Android Root.
3. Plug your Android device into your computer via USB cable.
4. Enable "USB Debugging mode" on your Android device.
5. Read notifications carefully before rooting your device.
6. Click "ROOT".
7. Waiting for a few seconds.
8. Check the root status of your device.

Other Android Root Software with Computer

KingRoot
Popular program for obtaining root rights using a computer, supports over 60,000 firmwares.
SuperOneClick
The program has a large list of supported Android devices for root access.
ROOT Wizard
The program gets root access to ZTE, Huawei, Lenovo, Samsung, HTC and other well-known brands of mobile phones.
UNREVOKED
A special way to get root rights for HTC devices using a computer.
MTKdroidTools
An application for obtaining root rights, creating a backup and much more via a computer.
VRoot
The lightest and most convenient program for rooting Android devices, with version 4.4.
Kingo Android Root
A handy program that will allow you to easily root your android device.
Geno Tools
The program will help you get root rights to android or remove them, if any.
Root with Restore by Bin4ry
The script for getting root rights should work on almost all ICS / JB devices.
Nexus Root Toolkit
The program will help owners of Nexus devices to get root rights in one click.
Unlock Root Pro
With this program you can root Android 2.1 - 4.0.3.
DooMLoRD Easy Rooting Toolkit
The program is easy to use and installs root rights using a computer.