MIUI 6: How to send photo messages (MMS) on your Xiaomi phone?

In MIUI 6, you can use the Messaging app to send photos.

i. To take a photo and send it using the Messaging app

1. Open the Messaging app, and then tap New message .
2. Enter a contact name or mobile number in the box that says To.
3. Tap +
4. Tap Take photo.
   
5. Take a photo to get it attached to your message.
6. Next, you can add text to the message, before tapping > to send out.
   

ii. To attach a photo to a text message in the Messaging app

1. Open the Messaging app, and then tap New message .
2. Enter a contact name or mobile number in the box that says To.
3. Tap +
4. Tap Pictures.
5. Choose the app that can access to the photo you want to send, and then follow by selecting the photo.
6. Next, you can add text to the message, before tapping > to send out.

(Xiaomi Phone User Guide/Manual for MIUI 6)