Is there any mobile phone software (non-intelligent) that can send seamless SMS?

If you use Android, you can download the flash message software directly. If you use Saipan, you can download the previous version of 360 or Security Manager, which contains seamless messages.

It is a short message that automatically adds string code forwarded by 360 security guards. The short message edited by the sender is directly sent to the mobile phone screen of the receiver, and only the content of the short message is displayed, and the phone number or address of the sender is not displayed. As long as the receiver presses the "OK" button, it can be viewed, but when the owner presses the "OK" button after reading, the message will be automatically deleted without leaving any trace.