1. Apple Lighting data cable 
There are 8Pin contacts on both sides of the Apple Lighting data cable interface, and the function of each contact is defined by the digital chip, regardless of front and back. 
2. Data cables for Micro-USB ports 
Micro-USB interface data cable, with anti - dull design, reverse can not be used.  This cable is used on older Android devices and most mobile power supplies (mobile power charging), and can be used on different Android devices. 
3.Type-C data cable 
The Type-C data cable is based on the USB3.1 standard, and the front and back of the interface are flat, which can be said to be an upgraded version of the Android Micro-USB interface data cable.