The principle of iPod touch520 is that it has a built-in Infineon communication module, which has a SIM card slot,

battery and related parts. The main premise is that the iPod Touch must be jailbroken first, and then the operating environment must be installed on the iPod Touch. Because the iPod Touch does not have a dialer, it is necessary to install a dedicated dialer and text messaging program.

CocoBlue, the iPhone Bluetooth mobile phone companion, is an international brand of accessories for high-end smart terminal devices founded by Shenzhen Coolpoint Technology Co., Ltd. The products include wireless (Bluetooth) Apple skins, non-jailbroken Bluetooth Apple skins, 3D printers, mobile power supplies and other products. CocoBlue T5, CocoBlue 3G and CocoBlue i5 wireless Bluetooth Apple Skin series products are innovative products independently developed by Shenzhen Kudian Technology Cable Company. They have multiple intellectual property rights such as trademark rights and invention patents, software copyrights, design patents and international patents. . Kudian Technology is headquartered in Futian District, Shenzhen, Guangdong, its global headquarters is located in Nevada, USA, and its branches are located in Guangzhou Operation Center and Hong Kong Operation Center