1. Click the Back key to return to the main interface, and then try to enter the software again.

2. If the card is still used, it is recommended to enter Settings-Find Application Manager-(All)-Find Software-(Save)-Clear data and clear the cache.

3. Check whether the same situation occurs in other software. If only this software can't be used normally, it is recommended to check whether the software has the latest version and try again after updating the version.

4. If not, please uninstall the software and try to reinstall it.

5. Confirm whether the software can be used normally on other devices, and eliminate the problems of the software itself.

6. If other devices can be used normally, it is recommended to back up the data (contacts, information, pictures, etc.) in the mobile phone. ) and try to restore the machine to factory settings.

If the problem still exists, please take the purchase invoice, maintenance card and machine to Samsung Service Center for inspection.