How to save short messages by adding a mobile phone

One plus mobile phone can directly save short messages.

There are two kinds of short messages: one is text or digital information sent or received directly by users through mobile phones or other telecommunication terminals, and the number of characters that users can receive and send short messages at a time is 160 English or digital characters or 70 Chinese characters. One is MMS. Its biggest feature is that it supports multimedia functions and can transmit comprehensive content and information, including text, images, sounds, data and other multimedia formats.