What does monthly SMS mean? Are there any benefits?

It means to pay a certain amount and get a certain number of short messages during the monthly subscription period. For example, if you want to buy 300 short messages, it costs 20 yuan, and on average, a short message is close to 7 cents. The news that we haven't run out won't be available until next month, and we have to buy it again. If you run out of messages before the end of the month, additional messages will still be calculated at 1 cent per minute.