Lenovo K30-t doesn't know what's going on. There's a direct call, and there's no sound. Restarting the phone is no problem.

According to the description, it is suggested to adjust the call sound through the volume key during the call. If there is a fault, please refer to:

1. Try talking to different contacts. If individual contacts talk, it is not ruled out that the other party's mobile phone is faulty. It is recommended to try to observe;

Please check whether the surrounding network environment is stable. It is suggested to change the network environment for comparison.

3. Use headphones to make calls. If the earphone can be used normally, send it to the maintenance site for treatment in time;

3. It is suggested to use the "Le Service" software, which can be used to detect the receiver and other components, and send them for repair in time if there is any fault;

4. If the call is normal in normal mode and other modes during the above investigation, it is suggested that you can back up the fuselage data and try to restore the settings. Before resuming operation, back up some important documents and files stored in the fuselage, such as short messages, contacts, photos, software, etc. , so as not to cause unnecessary losses. If the recovery is ineffective, please send it to the maintenance site for treatment in time.