An unresponsive notification pops up when using I use an app. What can I do?

Please try the below:

1. Clear all background apps to ensure that your phone has enough memory.
2. Restart your phone and then open the app, check there is enough memory and try again.
3. Go to Settings > Apps > See all apps > Find the app > Storage & cache > Clear storage and clear cache.
4. Update the system to the latest version.

If the issue persists, contact our Customer Support for further assistance.