How do I know if the other party's mobile phone is really down?

1. Calling is not an ideal way. If the other party has set up call forwarding and the call is forwarded to a stopped number, the other party's telephone system will still prompt "The number you dialed is stopped", but the other party has not stopped at this time. 2. It is suggested that you can send a short message to the other party and open the information report at the same time. If the information report status normally shows "Delivered", it means there are no stops. If you don't know the other party's service password and don't want to call, this is the only way to solve the problem.