Is it free to send text messages between Apple phones?

1. It’s not text messages that are free, it’s called iMessage. You need to turn on iMessage in Settings - Messages, and then you can send messages to each other in a cellular data or WiFi environment. The criterion is that the send button turns blue, which means iMessage.

2. If the mobile phone card sends the wrong text message, it will be billed according to the package used. It has nothing to do with the package used. If it is the one on the iPhone, it is not called a text message, but called iMessage. You need to turn on iMessage in Settings - Messages. Then in a cellular data or WiFi environment, they can be sent to each other. The criterion is that the send button turns blue.

3. Normal text messages are of course charged, but after iOS5, Apple has added an iMessage function. If the system version of two Apple devices is iOS5 or above, sending messages to each other will be enabled by default. It's iMessage, and you don't charge for text messages.