What happened when the SMS platform successfully sent but didn't receive the SMS?

First of all, take a look at the process of sending messages on the SMS platform:

You submit a short message to the platform from the software and API-> the platform sends it to the corresponding operator > the operator sends it to the mobile phone-> the mobile phone system receives and displays it.

From these aspects, there may be the following possibilities, please check them all:

You submit to the platform, and if the submission is successful, the platform returns success information;

The operator judges the information as spam and shields it.

The protection function of the mobile phone system or the third-party protection software judges that the short message is spam and blocks it;

There was a delay in delivery. We have submitted the advertising materials and will arrive the next day.

Usually, in order to ensure the short message arrival rate sent by the short message platform, there are the following suggestions:

The signature needs to be audited, and the signature that is not audited will generally be intercepted by the operator;

The short message content is the template content, which has been approved.

Take the 106 channel.

Pay attention to screen word filtering (provided by general platforms)

If it is advertising content, take the corresponding mass channels.

Don't send test information, meaningless information.

Be sure to choose a big platform. Baidu Cloud's "Simple Message Service SMS" service is good.