How to receive short messages on a mobile phone, and how many?

The split of mobile phone short message depends on the terminal split of the mobile phone itself. The number of mobile phone short messages is charged according to 70 Chinese characters or 140 bytes of a short message. However, if the mobile phone sends multiple messages by splitting, it will be charged according to the number of split mobile phone terminals. Some mobile phones, such as a short message, only have 60 words, but when the mobile phone sends it, it will be charged according to two words, so it doesn't matter if it is more than 70 words. You can't change this yourself, because the mobile phone is set in the factory.