Samsung Galaxy S5: How to Fix Double Notifications When Receiving a New Text Message in Android 4.4.2 Kitkat

By default, Samsung Galaxy S5 has been equipped with the stock Messaging app that can be used to send text messages or receive them. But, for some reason, you may want to install a third-party Messaging app in your phone, for instance when the stock Messaging app doesn't have a feature you're looking for. Since you finally have two Messaging apps: the stock Messaging app and a third-party Messaging app, it'll make you get double notifications when receiving a new text message. To fix this issue, there are two ways that you can do: set the third-party Messaging as the default app or disable notification of the stock Messaging app.

How to set a third-party Messaging app as the default app?
By default, you'll be asked to set the third-party Messaging app as the default app once this app is installed. But, in case you skip that step, you can manually set the third-party Messaging app as the default app by using the following steps:

1. On any screen, swipe down the top of the screen to open up the notification panel and then tap to go to the settings menu.
2. With the settings menu is displayed in grid view, scroll down to the Applications section and then tap Default applications .
3. Tap Messages and then select the required third-party Messaging app you want to set as the default.
4. Tap OK button.
5. The selected third-party Messaging app has been set as the default app.
6. From now on, you won't get any notification from the stock Messaging app and will only get notification from the third-party Messaging app you have set as the default when receiving a new text message.

How to disable notification of the stock Messaging app?
FYI, this step may make you miss important alerts and updates of the stock Messaging app. To disable the stock Messaging app notification, you can use one of the following methods:

Method #1: From the app menu

1. In home screen, tap the Apps icon at the bottom right corner of the screen. It'll bring you to the apps menu.
2. Find the Messages icon.
3. Tap and hold the Messages icon and then drag it to the App info icon located at the top of the screen. It'll bring you to the App info screen of the stock Messaging app.
4. Clear the checkbox in the left side of the Show notifications.
5. Tap OK button.
6. The notification of the stock Messaging app has been disabled.
7. From now on, you won't get any notification from the stock Messaging app and will only get notification from the third-party Messaging app when receiving a new text message.

Method #2: From the settings menu

1. On any screen, swipe down the top of the screen to open up the notification panel and then tap to go to the settings menu.
2. With the settings menu is displayed in grid view, scroll down to the Applications section and then tap Application manager .
3. Swipe the screen from the right to the left to access the ALL screen. All installed apps will be displayed here.
4. Scroll down to find Messages and then tap it.
5. Clear the checkbox in the left side of the Show notifications.
6. Tap OK button.
7. The notification of the stock Messaging has been disabled.
8. From now on, you won't get any notification from the stock Messaging app and will only get notification from the third-party Messaging app when receiving a new text message.