Why does the iPhone keep popping up iMessage?

Just turn off iMessage. The steps are as follows;?

Click "Settings" on the home screen,

Find the "Message" column, click to enter,

Click the switch on the right side of iMessage and turn it off. iMessage is an instant messaging software launched by Apple that can send text messages, videos, etc. It has very high security. iMessage is different from the SMS/MMS service of operators. Users only need data support through WiFi or 3G network to complete communication.

iMessage

iMessage is an instant messaging software launched by Apple. It can send text messages, videos, etc., and it has very high security. Different from the operator's SMS/MMS service, users only need data support through WiFi or cellular data network to complete communication.

Features

Exchange text, photos, and videos as much as you like.

Using iMessage, you can send and receive messages and photos with anyone using an iPad, iPhone, iPod touch or Mac user running

Mountain Lion , videos, location information and contact information.

If you have more than one Apple device, iMessage can keep conversations flowing across them all.

Also, you can send text messages, photos, and videos to other phones over cellular networks.

You can even ask Siri to send text messages for you.

Just say "Tell Xiaoli I'm on my way" and Siri will help you compose and send the message.