What does the function of locking information in SMS mean?

Locked SMS will not be deleted, and its main function is to protect users from deleting important information by mistake.

The advantages of short message 1, the sending channel is smooth: at present, you can also use gateways and cards to send short messages in groups. SMS, but the delivery rate is not as good as that? Short message group 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, but now? With the proliferation of SMS advertisements, 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. 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.