SMS saves time.

At present, China Unicom operators will store 48 hours of receiving allowance for you in the core network. If you don't receive SMS for more than 48 hours due to power off or no signal, it will be defined as junk data to be cleaned up.

When sending a short message, if the other party is off or out of service, the short message will be stored in the short message center for 48 hours. If the other party turns on the phone within 48 hours, the other party will receive the text message immediately. If it is not turned on for more than 48 hours, the short message center will delete the short message and prompt the sender that sending failed. Even if it is turned on later, the receiver will not receive this message and any prompt.

Extended data

When the mobile phone is in a normal state, and the information cannot be received in time due to reasons such as being turned off or not in the service area, the storage time of the information is as follows:

1. The storage time of point-to-point short messages in the network is 72 hours.

2. The SMS storage time of other operators is 48 hours.

3. Monternet SP, its own business, group answering customers, 10086 SMS storage time is 24 hours.