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Unknown Apps – What is it? How to Fix it?


on is an important part of Samsung phone, as it supports the calling function on your phone with Wi-Fi calling.

This application generally doesn’t give any issues, but at times you might encounter a persistent pop-up reading “Unfortunately has stopped“. This is an error and it can get quite frustrating, read on to find out how to fix this error and more about

What is is an application package that is present in most of the Samsung mobile devices, and it comes as a system app like and

Now let’s break down the terminology of

  • com – Compiler
  • samsung – Samsung (as it’s the manufacturer)
  • tmowfc – Related to T-Mobile (We’re not quite sure about the correct explanation for tmowfc but we’re sure it’s related to T-Mobile)
  • wfcpref – Wi-Fi calling preference

What is the use of is used when you attempt to make a call over Wi-Fi.

It is an integral part of the Phone app, which enables you to call over Wi-Fi rather than mobile network. Let’s talk a little bit more about Wi-Fi calling to know more about this.

What is Wi-Fi Calling?

Wi-Fi calling is the technology that enables a phone to make calls via Wi-Fi rather than mobile network. Which means you will be able to make calls on your phone even if you don’t have a mobile network, when you have Wi-Fi connectivity available.

You can enable Wi-Fi calling from your phone settings to make calls via Wi-Fi.

It is also sometimes called VoWiFi, short for Voice over Wi-Fi.

“Calls will be made over Wi-Fi” Notification

Sometimes, when the Wi-Fi calling service is enabled, you will get a persistent notification reading “Calls will be made over Wi-Fi”.

There is no issue with this notification being displayed. It just notifies you that this service is enabled now, and calls will be made using Wi-Fi rather than the mobile network.

Is a virus?


As you would understand by now, is not a virus.

Is safe?

Yes, is completely safe.

Is it safe to uninstall

It is not recommended to uninstall application from your phone.

Can I uninstall or disable from my phone?

By default, you will not be able to uninstall or disable from your phone.

There are methods like ADB uninstallation and by rooting to uninstall this app, but it is not recommended.

What does “used samsung.tmowfc.wfcpref” mean in my Google activity?

Google tracks the apps you open in your phone and records it in Google my activity section.

With “used samsung.tmowfc.wfcpref” message in Google My Activity, it just means that you just made a call using Wi-Fi calling and nothing else.

Issues caused by generally doesn’t cause any issues with your phone.

But sometimes the app crashed and a pop-up notification would appear on the screen saying “Unfortunately has stopped”. This issue can be solved easily using the steps mentioned below.

What is the “Unfortunately has stopped” error?

As we mentioned in the last paragraph, this pops up comes when the gets stuck or crashes. It will sometimes be persistent and would be coming back-to-back even if you close the pop up. But don’t worry, you can stop the pop-up by using the following steps.

How to fix “Unfortunately has stopped” error?

Here are the steps to fix this error:

  1. Open the “Settings” app on your phone.
  2. Select “Apps” from Settings menu.
  3. Click on the 3-dot menu on this page.
  4. Select “Show system apps” from this menu.
  5. Scroll down and locate from this list and choose it.
  6. On the next page, click on “Clear Cache” option.
  7. This issue should be resolved now.


So that was everything to know about and the unfortunately has stopped error. If you still have any questions or doubts regarding this, please comment below.

He started this blog! He is a passionate blogger & a tech enthusiast. He started his journey in blogging in 2014, but has been forever an enthusiast in Tech. His whole life revolves around tech.

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