How to check whether the other party's mobile phone is down?

You can turn on the SMS reminder of your mobile phone in your mobile phone settings, and then send a blank SMS to your mobile phone. When you receive the SMS report, it means that the other party has turned on the phone. If you don't receive it, it may not be opened.

If the other party is a mobile phone and the service of Fetion is enabled, you can check the status of the mobile phone through Fetion. If the transmission is successful, it can be said that it is turned on.

You can't make a phone call from your own phone. You can try calling from a public phone to check the status of the other party's mobile phone.