Is there a charge for sending messages?

Hello, dear, is there a charge for sending messages? There is a charge for sending text messages: different types of mobile phone cards have different charging standards. If the purchased mobile phone package does not include the number of text messages, then sending text messages costs money; If the mobile phone package contains a certain number of free SMS messages, then the number of SMS messages sent in the monthly package is free, and there is a charge for the excess. Generally speaking, short messages outside the package are 0. 1 yuan/message. Suppose you have a mobile phone package, which contains 100 minutes of calls and 300 short messages per month, and the excess is 0. 1 yuan/piece, then sending less than 300 short messages per month is free, and each of the more than 300 short messages is charged at 0. 1 yuan. I hope I can help you.