Why does Apple's mobile phone send text messages in blue and green?

The short messages displayed in green are operator short messages, which are generally charged according to the number of short messages. There is no limit to the sending of this short message, and it can be used regardless of the mobile phone model.

The background color of the SMS sent by myself is green, indicating that the SMS of traditional operators, namely mobile, telecom and Unicom, is currently used. In addition, you can also see a prompt with the words "SMS/MMS" in the SMS text input box.

Next, focus on short messages with blue background. In fact, this is a service provided by Apple for its own devices, which sends information through the network for free, that is, iMessage information, whether using wireless network or mobile network.

Of course, certain conditions are required when sending information with blue background. First, you must use Apple iPhone to open the iMessage function service in Settings-Information. As shown in the figure below, as long as you are currently using an iPhone, you can turn on this function yourself.

In addition, the other party also uses Apple's mobile phone. After opening the iMessage service, they can send free messages to each other. It is worth mentioning that you can not only send free iMessage blue messages between iPhone, but also send messages between iPod Touch, iPad and Mac, as long as both parties enable iMessage service.

Of course, for the iMessage information sent by the network, you can not only send text for free, but also send pictures and videos. Compared with traditional SMS, Apple's iMessage information has more advantages, not only for free, but also for sending videos.

There are also some tips when using iMessage information. When you encounter network signals from time to time, there will be a problem that information cannot be sent. Therefore, in the setting interface of iMessage, that is, Settings-Information, you can turn it on as an option to send short messages, so that when the network is not smooth, the system will automatically switch from iMessage to traditional short messages without delaying the sending of information.

In addition, when sending an iMessage message, you can also switch by pressing and holding the message being sent and selecting the option to send it using the short message service.