The virtual buttons aren't working or responding. What can I do?

Please try the below:

1. If you've recently downloaded and installed a third-party application, uninstall it to rule out software incompatibility issues. To do this, go to Settings > Apps > See all apps; find the third-party application then tap Uninstall.
2. If multiple apps are running at the same time, close and reopen them or restart your phone.
3. Back up your data and restore your phone to factory settings.
4. If your phone can detect the latest system version, update it by going to Settings > System > System update > Check for update (be sure to back up your data before upgrading).

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