Can SMS be blocked? How many kinds of short messages are there?

1. The phone can block short messages. Take Apple's mobile phone as an example. Open the interface of Apple mobile phone, find the setting icon on the desktop of Apple mobile phone, and click Enter; After entering the Apple mobile phone setting interface, click enter information; After entering the information interface of Apple mobile phone, click to enter the unknown and filtered information. After entering the unknown and filtered information interface of Apple mobile phone, click the function of filtering unknown senders to block most spam messages.

2. Short messages are divided into two types: 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.