Why does Apple have to turn on imessage to send text messages?

There is no charge for imessage. Simply put, it is to send text messages to each other (similar to WeChat). This function is turned on by default when sending. If you don't want to use it, you can go to "Settings" and click "Information" and choose to close iMessage.

Imessage can only be used among Apple users, and sending messages is free. You can't use Imessage with other mobile phone users. When you send a message to other mobile phone users and open Imessage, it will automatically become an ordinary message. If you don't turn on iMessage, Apple's messaging is no different from other mobile phones.

IPhone is a series of smart phones developed by Apple, which is equipped with the iOS mobile phone operating system developed by Apple. The first generation of iPhone was released by Steve Jobs, CEO of the company, on June 9, 2007, and officially released on June 29 of the same year.