How to fix An existing package by the same name with a conflicting signature is already installed

Description:  

You just need to ensure that your phone doesn't have the same application already installed whilst you are trying to install the same application's new APK.

So before installing the application, follow the following steps:

1. Go to Settings of your phone and look for an option that lists all applications in your phone and try to find whether the application that you are trying to install is already listed. If it is, then uninstall it from there.

2. Usually uninstalling by following steps

1.      Your device must be rooted. Root your device here.

2.      Your ES File Explorer Pro 1.0.4. Download here.

3.      Install and launch ES File Explorer.

4.      Go to the root directory. On ES File Explorer just click on option.

5.      Search the installed app in two places Given Below:

      

       First Navigate to system

then Search the app in two folders: App & Vendor Folders

then delete the installed apps in app folder what you want.

and in vendor folder there are two folder where you find pre-installed apps

6.      Open the folder and delete the app.

7.      Now just restart your device.

8.      Install your app.

Once you have deleted your app by following the above steps then you can go ahead and install your app. Hopefully you won't see "an existing package by the same name with a conflicting signature is already installed" error message.