Thanks for letting us know about your experience with your beloved Samsung Galaxy A04s having issues with the lock screen the always getting back to its default style. In addition to our dear Samsung members' replies, you may check and follow below steps.
Before you try out the below recommendations as to your solution, be sure to check if your device's software and apps are updated with the latest version. Please check how to update your mobile device's software in the following order.
Step 1. Go to Settings > Software update.
Step 2. Tap on Download and install.
Step 3. Follow the on-screen instructions.
Boot your device to Safe Mode.
Step 1.Turn the device off by holding the Power button until the option to Power Off appears on the screen. Tap Power off.
Step 2.Press and hold the Power and the Volume Down buttons at the same time, to turn the device on. When you see the Samsung logo appear on the screen, you can let go of the Power button while the device boots up. Make sure to keep holding the Volume Down button.
Step 3.If done correctly,'Safe Mode'will display on the bottom left corner of the screen. If'Safe Mode'does not appear, repeat the steps above.
Step 4.Once you're in Safe Mode, you can remove the third-party app that is causing issues on your phone.
Exit Safe Mode.
To exit Safe Mode, simply restart your phone and it will reboot normally. You can also enter Safe Mode by pressing the Power key, touching and holding the Power off icon, and then touching the Safe Mode icon.
