Development of BlackBerry: Since the establishment of RIM in 1984, the early products are RIM850/950 and RIM857/957. Their appearance is very similar to the familiar pagers, but they are bigger, have more buttons and have the function of sending and receiving emails. After that, the products of 5790/58 10 and 62 10/6280 are not much different from those of blackberry products in appearance, except that they are equipped with monochrome screens and 16M memory, and do not have the call function. 6230 should be an epoch-making product in BlackBerry. Since 6230, BlackBerry has officially supported the calling function and become a real "mobile phone". Contemporary with 6230, there are 65 10/6750/67 10 and other models. Followed by the more popular 7230/7290 and 7 100/7 130/8700 series in China. This generation of products are generally equipped with color screens, and 7 130 and 8700 series also provide support for chord ringtones and MP3 ringtones. This also marks RIM's determination to turn the BlackBerry series into a mobile phone with more entertainment functions-this development direction. So, on the latest BlackBerry 8 100/8800/8830 and the latest 8300, we have seen a series of gorgeous functions that BlackBerry has never had before: memory card support, 2 megapixel camera, flash, MP3, video playback and a series of multimedia functions that attract users.