Why can mobile phones send short messages but not MMS? What happened?

If you can't send MMS, there will be many situations. The specific steps are as follows: 1. First, check whether the MMS function is turned on on the mobile phone. If it is enabled, go to the next step. 2. Check whether the mobile phone supports MMS function. If not, it is recommended to replace the mobile phone. If so, please continue to the next step. 3. Check whether the MMS parameter settings are correct. Relevant parameters are as follows: MMS center URL: mmsc.vnet.mobi; ; WAP gateway IP address:10.0.0.200; WAP gateway port number: 80; Access to ctwap@mycdma.cn/vnet.mobi. APN/Password: If the parameters are incorrect, please reset them. If the parameters are correct, go to the next step. 4. Check whether the MMS album is full. If it is full, please delete it and try again. If not, please proceed to the next step. 5. Check whether the sent attachment exceeds the upper limit of the attachment supported by the mobile phone or exceeds the limit of telecommunications. If the attachment is too large, it is recommended to adjust it before sending it. "MMS" refers to the service name of MMS service given by China Telecom. The English name of MultimediaMessagingService is multimedia messaging service, abbreviated as MMS, which is usually called multimedia short message. China Telecom's MMS service is based on wireless application protocol and supports multimedia functions. It can transmit all-round content and information through CDMA data network of China Telecom, including text, image, sound, data and other multimedia formats. Rich in content, large in capacity, novel and innovative. For more service benefits, click "official website" customer service 95 below to answer your questions.