Is it possible that the cost of sending MMS is cheaper than that of ordinary SMS?

In principle, it is impossible, because now MMS is 30 minutes and SMS is 1 minute.

But we can solve it in another way.

There is a word limit for SMS, that is, it cannot exceed 70 words. Even if you are 7 1, they will send it to you twice, and of course they will charge you 20 points. One feature of MMS is its large capacity. I roughly estimated that the capacity of a multimedia message is about 6 short messages. Of course, the specific mobile phone is different, and the capacity will be different.