Unicom card sends SMS by MMS.

When you send a text message, you attach a picture, but the other party can only receive a text message without receiving the picture, right? If so, there are many reasons. MMS is transmitted through the network, and both parties must turn on the GPRS internet access function, and the mobile phone has enough space to store MMS pictures, and there must be network signal coverage at that time. If you still can't use MMS normally, you can take your mobile phone card to your business hall for testing.