Samsung mobile phone keyboard cannot be used normally. How can this problem be solved?

1. Turn off the phone and take out the battery. Re-insert the battery and check whether the problem persists.

2. Check whether any third-party software is incompatible and uninstall it.

3. Make sure that your mobile phone firmware has been upgraded to the latest version. You can use Kies or FOTA to update the device to the latest version.

If the problem persists, we recommend that you back up your important data and try to restore the factory settings.

If the problem persists, contact the Samsung service center.