#USB

Times have changed a lot since then, and electronic devices have gone from that circular port to a USB port instead, making battery charging and file transfer more efficient than what it was once. Let’s take a quick look through the evolution of the USB ports in smartphones.   Before anything else, all of the USB ports mentioned here have the USB Type-A as its socket connector. Mini-USB The Mini-USB was first introduced in the year 2000 and was used to connect not only mobile devices but a whole other of electronics, namely MP3 players, cameras, and PDAs. USB-Mini connectors were equipped with 5 pins and were rather small compared to the size of a USB A. One of Motorola's flip phones, the Moto Razr V3, had a mini-USB port.  Motorola Moto Razr V3 micro-USB First announced in 2007, the micro-USB became the standard port for almost all the newer smartphone devices. Other electronics followed suit as well, as the micro-USB’s connecting port is much smaller in size compared to that of a USB-mini. Despite being smaller, the micro-USB retained a high transfer rate of 480Mbps. Read more in our articles including "Evolution of the USB in Smartphones" and "Comparison: Apple Lightning vs USB Type-C".