Root Android Phones for different-different mobile platform in 4 way

How to Root Android Phones

Rooting your Android phone gives you more access to your operating system, allowing higher level of optimization. Since there is so much variety in Android phones, there is no rooting method that will work for every phone or every version of Android. To get started, you will need to download the appropriate rooting software for your phone model (most of them are for Windows only), enable USB debugging on the phone, and configure your USB drivers on your computer. Be sure to backup your data before rooting.

Rooting Samsung Galaxy S/Edge Phones

Step 1:
Go to "About Settings> About" on your phone. The "menu" button is below the settings menu.
Note: These steps are specially written for the Galaxy S7 and S7 Edge models, but possibly as long as you download the right CF Auto Root file for your phone model, work for the previous Galaxy S model will do.
Step 2:
Tap "Build Number" 7 times. This will enable developer options on your phone
Step 3:
Go back to "Settings" and tap "Developer". This menu option appears after enabling Developer Mode and has a list of developers and debugging options that are usually hidden.
Step 4:
Select "OEM unlock". This setting will allow you to root your phone. 
Step 5:
Install and open Odin on your computer. Odin is specially designed to rooting Samsung phones, but is only available for Windows.

• This software can also be used to root an older model like the Galaxy S6, but you will need to download the appropriate AutoRoot file.

Step 6:
Download and Install Samsung USB Driver It is necessary to use the phone's USB debugging options on your computer.
Step 7:
Download and extract the S or Edge chainfire Autoroot file. Right-click the .zip file and select "Extract". The extracted file will have the .tar.md5 extension.

• If you are rooting the old Galaxy S Phone, then search the CF AutoRight site for the right autoroot file for your specific model. Using the right autoroot file is very important to prevent damage to your phone.

Step 8:
Hold the Home, Power, and Volume Down buttons together on your phone. After a few moments, the phone will enter the download mode.
Step 9:
ODIN is running, while your phone is connected to your computer via USB and your phone is in download mode. After a few moments, Odin will display "Added Message" which indicates that the connection between phone and Odin is working.
Step 10:
Click "AP". You will be asked to browse to use the file.
Step 11:
Select the extracted AutoRoot file that ends in .tar.md5.
Step 12:
Press Start. The rooting process will start Your phone will reboot into the whole process and then it will boot in Android when it's finished.

Rooting a Nexus Phone

Step 1:
Turn on your phone and connect your phone to your computer via USB.
Step 2:
Install and open the Nexus Root Toolkit on your computer. The Nexus root toolkit can be used to unlock and root a Nexus device. On launch, you will be asked for your phone model and Android OS version.
Step 3:
Select your phone model from the drop-down menu.

• If you are unsure, go to "Settings> About Phone" on your phone. The model is listed under "Model Number".

Step 4:
Choose the version of Android that you are currently running from the second drop-down menu.

• If you are unsure, go to "Settings> About Phone" on your phone. Sections will show you the exact information you need to select "Android version" and "build number".

Step 5:
Press Apply. To enable USB debugging mode you will be taken to a window with exact instructions.
Step 6:
Go to "Settings> About Phone" on your phone. The "About Phone" setting is below the page.
Step 7:
Tap "Build Number" 7 times. On the "About Phone" page is about "About Phone" page. After the 7th tap, you will see a message informing your developer mode is enabled.
Step 8:
Go back to "Settings" and tap "Developer". This menu option appears after enabling Developer Mode and has a list of developers and debugging options that are usually hidden.
Step 9:
Select "USB debugging" and press "OK". You will see a prompt to allow debugging access from the computer in which you are connected.
Step 10:
Select "Always allow from this computer" and press "OK".
Step 11:
Press "OK" in the Nexus window of the Nexus Root Toolkit. The program will automatically detect the dependencies needed to root your phone.
Step 12:
Press "Update all file dependencies + Update" and then press "Continue" The dependency will be downloaded and you will be taken to the main Nexus Root Toolkit interface.
Step 13:
For instructions on configuring your drivers, press "Full Driver Installation Guide". The steps will vary depending on your current driver setup. If you have previously connected another Android phone to your computer, you will need to uninstall an old driver, then the Nexus Root Toolkit will recommend and provide the driver installation kit to match your setup.
Step 14:
Press "Backup" to save the data you want to keep (optional). It will open a menu with various backup options, such as contacts, SMS or app data. Each button will provide specific instructions for data backup on your computer.
Step 15:
Press "unlock". This will unlock the bootloader, so you can root the device. Note: This process will erase all data on your phone, so make sure that you have made a backup of whatever you want to keep.
Step 16:
Press "Root". The Nexus root toolkit will route your device and automatically install SuperSU root software. When the process is completed then your phone will be rooted!
Step 17:
Press "Restore" This will open a window with various restoration options that match the backup options. Press each option to restore from the backup you created.

Rooting Phones with WinDroid Toolkit

Step 1:
To make sure that you can use WinDroid Toolkit with your phone, see the device compatibility list.
Step 2:
Connect your phone to your computer via USB.
Step 3:
Go to "Settings> About Phone" on your phone. The "About Phone" setting is below the page.
Step 4:
Tap "Build Number" 7 times. On the "About Phone" page is about "About Phone" page. After the 7th tap, you will see a message informing you that developer mode is enabled.
Step 5:
Go back to "Settings" and tap "Developer". This menu option appears after enabling Developer Mode and has a list of developers and debugging options that are usually hidden.
Step 6:
Select "USB debugging" and press "OK". You will see a prompt to allow debugging access from the computer in which you are connected.
Step 7:
Select "Always allow from your computer" and press "OK".
Step 8:
Download and open the WinDroid Toolkit on your computer. After launch, you will be asked to download ADB if it is not already on your computer.
This program is currently only for Windows.
Step 9:
Click to download ADB (Android Debug Bridge). If you already have ADB installed then this prompts will not be visible. After installing ADB driver, a list of supported devices will appear.
Step 10:
Select your phone brand. The list will expand to display supported models.
Step 11:
Choose your model. After selecting your model, Winroot Toolkit will automatically download the recovery image and will autoroot files to your phone. Once the download is complete you will be taken to the main interface. 

• In the lower left corner is the indicator of your online status. If you lose connection at some point, press "Refresh" in the lower right corner to return online.

Step 12:
In the descending order, click on the option (s) to appear in the "Unlock Bootloader" column. The buttons you see here will vary depending on the phone you unlock (for example, "Request unlock" or "Get token ID"). WinRoot Toolkit will provide instructions on how to prepare the phone to unlock.
Step 13:
Click "Unlock Bootloader". This button runs to unlock your bootloader to download and run Winroot Toolkit automatically.
Unlocking your bootloader will erase data on your phone. Make sure you back up any data you want to keep before doing this.
Step 14:
Click on the option that appears under the "Flash Recovery" header. This option will vary depending on the phone you are flashing (for example, "Flash TWRP"). It will automatically reboot your phone into fastboot mode and install the recovery image. Upon completion, you will be asked to reboot your phone.
Step 15:
Click "Yes" to reboot your phone. Winroot Toolkit will reboot your phone using ADB.
Step 16:
Click on "Flash SuperSU" in the "Benefit Route" column. A window will appear that tells you to verify that you want to start the rooting process.
Step 17:
Click "Yes". The Winroot Toolkit will automatically transfer the SuperSU autoroot file to your phone and it will boot into the recovery image.
Step 18:
Install SuperSU from Recovery. Depending on which recovery is being used, buttons may vary. Once installed, a notification will appear in the Winroot Toolkit that the root was successful and to reboot your phone.

• For example, with TRWP Recovery, press "Install", then select SuperSU file and swipe "Confirm Flash" to enable SuperSU on your phone.

Step 19:
Reboot your phone. Your phone will boot in Android OS with root access!

Rooting Other Android Phones
Step 1:
Find XDA platform for your phone model. The XDA platform is a collective of Android developers who create ways to route different phones. Search for "Jump to Header" and click on your phone's brand name. Then search for your phone model for specific instructions on how to root your phone.
Step 2:
Get acquainted with Android SDK (Software Development Kit) and ADB (Android Debug Bridge) tools. These tools use your computer's command line and are essential for unlocking and rooting some new phones like HTC 10 or Moto X net.
Android SDK is also the most common tool for routing an Android phone from a Mac.
Step 3:
Route for old phones using the 'one-click' software. Programs like Towelroot or KINGROOT can be used to route some older phone models running Android 4.4 or older. Check each phone to make sure your phone model is supported by software.