IPhone phones usually send text messages to remind each other of the different meanings of delivered and read.

Prompt "Sent": indicates that the message was sent successfully and accepted by the other party.

Prompt "Read": indicates that the information has been clicked by the other party.

Extended data:

Advantages of SMS:

1, the sending channel is smooth: at present, SMS can also be sent through gateways and cards, but the delivery arrival rate is not as good as that of SMS sending platform. The reason is that the SMS sending platform has many sending channels and high sending arrival rate.

2. Simple operation: The short message group sending platform used in the network background can independently write relevant text content according to the sender's needs, which is simple to operate and convenient to modify. At the same time, unified transmission also ensures the accuracy of information.

Disadvantages of SMS:

1, the information capacity is small, and it is not attractive to people: SMS platform is boring because it can only edit text and lacks corresponding picture materials, and now SMS advertisements are rampant, and the reading rate is not necessarily too high. The sending cost of MMS is too high.

2. 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 may not be comprehensive.

References:

Baidu Encyclopedia-SMS