How to check whether the short message you sent has been received by the other party?

There will be a reminder when sending fails. As long as you don't receive the message of receiving failure, the other party will receive it.

Terminal data is difficult to collect.

SMS platform needs corresponding numbers to send, and how to collect these numbers and how to send them to those customers after collection has become a very important issue, so the customer coverage of SMS platform is not necessarily comprehensive.

Transmission limitation

Generally, the number of SMS platforms is limited, thousands or even tens of thousands. It is basically impossible to send messages after 8 pm, and its flexibility and management are not as good as that of SMS power grid.

Voice message

Voice short message service refers to recording what you want to say through fixed telephone, PHS or mobile phone and sending it to one or more users so that they can listen to your message. At the same time, you can also receive, forward, query, reply and request voice messages according to the prompt tone of the mobile phone.