BlackBerry manufacturer RIM. RIM (Research in Motion Ltd) is a Canadian communication company, founded in 1984, which manufactures networked infrared LED displays for general motors. In the early 1990s, Motorola tried to combine e-mail with paging, but at that time, e-mail on PC had not been well developed, let alone wireless e-mail, so Motorola gave up. In 1997, RIM made a list of wireless e-mail devices worth 50 million dollars for BellSouth to help transporters use Ericsson technology to track inventory in a network called Mobitex. This project is very critical, and RIM can test its equipment in a network environment. RIM Canada's main product is the mobile communication device BlackBerry. RIM's company is headquartered in Waterloo, Ontario, Canada; It is also the main sponsor of RIM Park in the northeast of the city. The company was founded by current co-CEOs Mike Lazaridis and Jim Balsillie. RIM uses C++ and Java technology to develop its own software for its products. Similarly, RIM also sells embedded wireless communication components. I don't know if you have ever used blackberry, but it is available on the market. It's quite cheap. You should mean the brand computer of this company.

There is also a video demonstration about this on the Internet.

You can search Baidu for "Long Yun Mobile Network", which has a video viewing column.

Just follow the video in the column, because

There is a very detailed introduction in the video. About "What brand is mobile phone RIM?"