Time limit for SMS storage

That's the time that you save a text message in the SMS gateway (the equipment in the operator's computer room), that is, if you send a text message and the other party fails to receive it for some reason, the message will be saved in the SMS gateway for a period of time (if the other party's mobile phone is detected to be online during this period, it will be automatically retransmitted), and if it fails to send it successfully after the time, it will be deleted, not referring to the received message.

If received, the information will be permanently stored in the mobile phone, unless you set up automatic deletion or manual deletion.