1. Find the application icon on your phone and hold it down.

2. In the pop-up options, select "Uninstall" or "Delete".

3. When you confirm the prompt, click OK or Uninstall.

4. Wait a moment, and the system will automatically delete the application and clear the relevant data.

If the above methods can't delete the application, you can try the following advanced operations:

1. Enter the setting menu of the mobile phone.

2. Locate and click the Application Management or Application option.

3. Find the fast cat application in the application list.

4. Click Apply to enter the application details page.

5. Locate the Uninstall or Delete button in the application details page, and then click OK.

6. Wait a moment, and the system will automatically delete the application and clear the relevant data.

If it is found that the above methods still cannot delete the malicious App, it may be because the app has obtained administrator rights or implanted malicious programs. At this point, I suggest you do the following:

1. Enter the setting menu of the mobile phone.

2. Find and click the "Security and Privacy" option.

3. In the security and privacy settings, find the "Device Manager" option.

4. In the device manager, find the application of fast cat.

5. Click Apply to enter the application details page.

6. Locate the Deactivate or Delete button in the application details page, and then click OK.

7. Go back to the previous menu and try to delete the application again.