Some MMS messages will be displayed and sent, while others will not be displayed.

For the following reasons, the multimedia message does not display the sent content:

1. The other party's mobile phone is not enabled with mobile data network or Wi-Fi. MMS needs the support of mobile data network or Wi-Fi to be sent and received normally. If the corresponding network service is not enabled on the other party's mobile phone, the multimedia message cannot be sent, and the sending status will not be displayed.

2. The other party's mobile phone space is insufficient. MMS also needs the storage space of mobile phone for storage and processing. If the storage space of the other party's mobile phone is insufficient, the multimedia message cannot be stored, and the sending status will not be displayed.

3. Network problems. MMS is sent and received through the network. If the network is unstable or there is a problem with the network connection, the MMS cannot be sent or received normally, and the sending status cannot be displayed.

If the multimedia message you sent can never be delivered, I suggest you check the network settings of the other party's mobile phone to confirm whether there is enough storage space. If there are no problems in these aspects, you can try to resend the MMS or contact the other mobile phone operator to handle it.