SIM card 2 cannot set the message ringtone.

Setting method of dual-card SMS ringtone: information-menu key-settings-notification information setting -SIM card 1/SIM card 2- selecting ringtone.

If it can't be set, I suggest you check whether the mobile phone has downloaded the third-party ringtone setting software, which may be caused by the incompatibility between the software and the mobile phone. I suggest you uninstall the software and check whether it is back to normal.

If the problem still exists, it is recommended that you back up your mobile phone data and restore the factory settings.