What's the difference between SMS and MMS?

SMS only charges information fee, usually 10 cents.

MMS can transmit pictures, ringtones and other information, so you have to charge a traffic fee. It's usually 90 cents each. But now MMS seems to have preferential policies everywhere.

SMS is a text message transmitted through the No.7 signaling network. The size of information content is limited to 70 words (140 bytes). Short messages are mainly sent and received end-to-end through mobile phones and between mobile phones and the Internet.

MMS is not a real short message with multimedia information, and it has nothing to do with short messages technically. With the support of GPRS network and WAP wireless application protocol as the carrier, it transmits not only words, but also pictures, animations, sounds and other information.

However, because the receiving process of MMS is very similar to SMS, it will cause an illusion that MMS is an extension and extension of SMS.