What is RILNotifier and How to Fix the Wireless Data Connection Error?

RILNotifier is a pre-installed system application found on Android devices. A lot of Android users have complained that this app causes the “RILNotifier unable to establish a wireless data connection” error.

If you’re getting this error and battery draining issue then don’t worry because, in this article, I’ll explain what is RILNotifier, is it safe and how to fix issues caused by this app.

What is the RILNotifier App?

RILNotifier or Radio Interface Layer Notifier is a system application on Android devices that acts as an interface between the apps that provide telephony services(Call tracker, SMS, Data tracker) and the radio hardware(modems) installed on your device. RILNotifier notifies these apps about any change in the wireless network mode of the device.

If your device is connected to the Internet using Mobile data with 4G or 5G LTE and you switch to a Wi-Fi network then RilNotifier will inform the apps about the change in the network mode.

There is not much information on RILNotifier because it is a highly technical term that the developers don’t want the consumers to bother about. However, it is clear that RILNotifier informs apps that use telephony services like Voice Calling, Wi-Fi Calling, SMS, MMS, etc. about a change in the current network mode.

This feature is also used by Google to detect what network mode you’re using to download apps from the Google Play Store. Using this technology, Google notifies you to change your network mode from Mobile data to Wi-Fi when you’re downloading a large app from the Play Store.

The Android Package file name for RIL Notifier is com.sec.app.rilerrornotifier.

What is RIL?

RIL or Radio Interface Layer is a layer in the Operating System(Android) of a device that acts as an abstraction layer between Android telephony services(android.telephony) and radio hardware like the modems installed on the device.

The RIL is made up of two important components – RIL Daemon and Vendor RIL.

RIL Daemon processes all the communication data from Android telephony services (Call, SMS) and transmits it to the Vendor RIL as solicited commands.

Vendor RIL processes all the communication data with radio hardware(modems) and transmits calls to the RIL Daemon as unsolicited commands.

You can learn more about the Android RIL Architecture in this article.

Is RILNotifier Safe?

Yes, RILNotifier is totally safe since it is a system application that is required for the proper functioning of the device and is present on all Android devices. In some Android devices, the RILNotifier is known by a different name called Service mode RIL.

Some people believe that RILNotifier is a Virus or Spyware but it’s totally false. It doesn’t cause any potential harm to your device and it doesn’t spy on or sell your data.

RILNotifier is also not bloatware because it doesn’t consume system resources unnecessarily. It is a very important application that is required for data transmission between telephony apps and radio hardware(modems).

Most users just assume things looking at the system apps and background processes running on their device. A great example of this is the Carrier Hub app. People think it is bloatware however it is a very important application that is used to enable VoWiFi, WiFi Calling, etc.

Another example is the com.android.incallui app that people thought to be a spy app which was used to monitor your partner’s calls but is an important application that contains the User Interface (UI) data of your phone’s Call dialer app.

What Permissions does RILNotifier use?

RILNotifier uses Telephone permission because it is related to Android telephony services. The Telephone permission allows this app to modify phone state, read phone status and identity. You cannot deny this permission because it’s necessary permission for the app to operate.

In some Android devices, RILNotifier might use the Storage permission along with the Telephone permission.

RILNotifier High Battery Consumption issue

Some users have complained that RILNotifier has high battery consumption and drains the battery quickly but there is no evidence of this.

RIL Notifier has very low CPU usage and doesn’t consume a lot of battery charge therefore it shouldn’t drain your battery.

battery draining issue

If you’re using a Samsung device then the battery draining might be caused by the KNOX app.

What is the “Unable to Establish a Wireless Data Connection” error in Android?

Many users have complained about the Data Connection error that occurs due to the RILNotifier. It is predominantly seen in Samsung devices like Samsung Galaxy S9 or Galaxy S10 using the Sprint carrier network. People believe that this is the network carrier’s fault but that’s not the case.

The “Unable to Establish a Wireless Data Connection” error is a network authentication error where your device fails to register with a particular component of the mobile network carrier and cannot connect to the Internet using Mobile data.

This error can pop up randomly when you have your mobile data turned on but your device is unable to receive data services.

The “Unable to Establish a Wireless Data Connection” error can occur due to the following reasons:

(1) The Carrier network cannot Provision your device

If the mobile carrier network is unable to authenticate the customer’s device on their server they block access to mobile data services and it leads to this error.

(2) Device is unable to connect to Mobile services

If you are using your device in an area where it cannot connect to the carrier network then it could lead to this error.

(3) Registering a new device with old SIM card

This error can also occur if you register a new device with your old SIM card and phone number. You get this error because your ESN and SIM numbers don’t match the ones your mobile carrier has registered on their servers.

(4) Your Preferred Roaming List (PRL) is not updated

The Preferred Roaming List(PRL) is a database used in CDMA phones which is built and provided by your carrier network and used when your phone is connecting to the tower.

Updating the PRL allows the phone to choose the best roaming carriers when your device is outside of the network’s local area. This can help you fix this error on your device.

(5) You have a custom ROM installed on your device

Sometimes, this error can occur if you’re using a custom ROM or Kernel on your Android device instead of the Stock ROM.

How to Fix the “Unable to Establish a Wireless Data Connection” error in Android?

This error can be fixed by a variety of methods but some might work for you and some won’t. This is why I advise you to try out all the solutions mentioned below properly.

(1) Turn off Mobile Data and Turn It on Again

The “Unable to Establish a Wireless Data Connection” error occurs because your device is unable to connect to Mobile data services.

So, if you turn your Mobile Data off then this will stop the popup from appearing because your device cannot connect to the mobile data services. After turning off your mobile data, wait for a few seconds and then turn it on again.

Sometimes this error can occur if your device cannot register the SIM card properly. In that case, you can try removing the SIM card from your device and reinserting it again.

(2) Reboot your Device

In some cases, a simple restart can solve these issues and it is extremely simple. All you have to do is press and hold the Power button on your device and choose the Reboot option. This will restart your device and hopefully fix this error.

(3) Disable the Carrier Network LTE Band

This method will disable the Carrier network LTE and your phone will start using the default LTE frequency channels. Here are the steps to disable the LTE band.

Step 1 – Open your dialer and dial ##3282#

Step 2 – A new menu will open and you have to tap on Edit.

Step 3 – Tap on MSL then type 000000 and tap on OK.

Step 4 – Select LTE and go to Band #

Step 5 – Tap on Disable and reboot your device.

(4) Change the Network Mode

If you have the wrong network mode selected on your device then you can fix this error by changing the network mode. Follow the steps below to change your network mode.

Step 1 – Go to Settings > Connection > Mobile networks > Network mode.

Step 2 – Choose LTE/CDMA.

Step 3 – After doing the above, go to Settings > General > System Updates.

Step 4 – Tap on Update Profile.

This will make sure the error doesn’t pop up if you had the wrong network mode selected.

(5) Update your device’s Preferred Roaming List (PRL)

You can update your device’s Preferred Roaming List (PRL) by following the steps mentioned below.

Step 1 – Turn off Mobile data.

Step 2 – Connect to the Internet using a WiFi network.

Step 3 – Open the Settings app.

Step 4 – Scroll down and tap on Software update.

Step 5 – Tap on Update PRL.

Step 6 – After it’s done, tap on OK.

If you cannot update PRL using this method then you can use another method to update PRL.

Step 1 – Open the dialer app, type *228, and tap on the Call button.

Step 2 – Open your Keypad and select 2.

Wait for a few seconds and you’ll get a confirmation message that your phone’s PRL has been updated.

(6) Turn Off App Notifications for RILNotifier

If you turn off app notifications for the RILNotifier app you won’t get the “Unable to Establish a Wireless Data Connection” error on your device. But since this issue is caused when your device doesn’t have access to data services, turning off app notifications will temporarily solve the problem.

It won’t fix the root cause behind the problem but it will get rid of those annoying error notifications. After you solve this error you can re-enable the notifications. Follow the steps below to turn off RILNotifier app notifications.

Step 1 – Go to Settings.

Step 2 – Tap on Apps.

Step 3 – Tap on the Ellipsis icon (three vertical dots) in the upper right corner.

Step 4 – Tap on Show System apps.

Step 5 – Locate RILNotifier from the list and tap on it.

Step 6 –  Tap on Notifications

Step 7 – Tap on the toggle switch to turn off app notifications for the RILNotifier app.

The steps might vary slightly depending on the device manufacturer and the Android version you’re using.

(7) Reset Mobile Network Settings

You can reset your mobile device network settings by dialing ##72786# on your phone. This code is called Special Code to Reset The Network(SCRTN).

After dialing the code, your device will reboot, the mobile network settings will be reset and the error hopefully will not appear.

(8) Flash stock ROM (Firmware)

If you’re using a Custom ROM or Kernel on your Android device then flashing the stock ROM can remove this error from your device.

You can flash the stock ROM manually using the SP Flash tool. Here is a guide that shows you how to do this.

Can you Disable or Uninstall RILNotifier?

RILNotifier is a system application so you cannot uninstall it in the traditional way you uninstall other apps. To uninstall RILNotifier, you’ll need to use either the Android Debug Bridge(ADB) or the System App Remover application (requires root access).

I recommend that you keep RILNotifier running and don’t uninstall it because it is a system application and uninstalling system applications could lead to issues in the proper functioning of your device.

RILNotifier is an important part of telephony services and removing it could lead to issues with Android telephony services.

How to Uninstall RILNotifier?

You can uninstall RILNotifier using ADB or System App Remover application. Both the methods are mentioned below in detail.

Uninstall RILNotifier using ADB

ADB allows you to bring up a Unix shell so you can issue commands directly on the Android device. You’ll need a Windows PC to use ADB.

Here are the steps to uninstall RILNotifier using ADB.

Step 1 – Go to Settings > System > About phone

Step 2 – Tap on the Build number 7 times to activate Developer Options.

Step 3 – Go back to the main Settings menu and tap on Developer Options to open it.

Step 4 – Enable USB debugging by tapping on it.

Step 5Download ADB on your PC.

Step 6 – Extract the ZIP file into a folder.

Step 7 – After extracting the ZIP file, open that folder.

Step 8 – Press and hold the shift button and right-click in a blank area.

Step 9 – Click on “Open Powershell window here.”

Step 10 – Enter the command adb devices.

Step 11 – Connect your Android device to the PC using a USB data cable. 

Step 12 – Type the command adb shell pm uninstall –user 0 com.sec.app.rilerrornotifier and press Enter to run this command. Wait for a few seconds and you’ll notice the app has been uninstalled from your device.

Note – To disable the RILNotifier app instead of uninstalling it, you need to replace “uninstall” with “disable” in Step 12 of the adb command shown above.

Uninstall RILNotifier using System App Remover

This method requires you to gain root access to your device. If you don’t know how to root your Android device then check our Android Rooting guide.

After gaining root access follow the steps below to uninstall RILNotifier.

Step 1 – Download and install the System App Remover application.

Step 2 – Launch the System App Remover application, search for RILNotifier or com.sec.app.rilerrornotifier, and tap the checkmark box next to the app.

Step 3 – Tap on the Uninstall button to completely uninstall the app and delete its data.


RIL Notifier is a system application on Android devices that acts as an interface between the apps that provide telephony services and the radio hardware. Sometimes, it causes the “Unable to Establish a Wireless Data Connection” error which can be fixed using the methods mentioned in the article.

You should not uninstall this app because it is a system application but if you still want to disable or uninstall the app then you can follow the methods mentioned in this article.

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