The exceptionally little USB port found on numerous non-Apple cellphones, tablets and other convenient gadgets is a Micro USB attachment. Extensively more modest than USB Type An and B, Micro USB is additionally a large portion of the thickness of Mini USB (see outline beneath). Miniature USB has been supplanted by USB Type C on numerous new items. See Mini USB, USB Type C, USB 3.0, USB OTG and USB.
The Smallest USB Socket
The link that connects to the Micro USB 2.0 attachment on this cell phone has a Type A fitting at the opposite end for the PC or AC charger. Miniature USB 3.0 attachments acknowledge a 2.0 fitting, yet not the other way around.
Miniature USB 2.0 and 3.0
These are the two Micro-B attachments. A 5-pin USB 2.0 fitting will slide into the left half of a 10-pin 3.0 attachment however clearly not the opposite way around.
Two-in-One Micro USB/USB
The regular USB Type-An and Micro-B can be consolidated in a similar attachment by utilizing a moving external shell.