Android smartphones have used the USB Micro-B connector for both data transfer and charging almost exclusively since their introduction in 2008. Android tablets also use Micro USB but often have a separate port for their own power adapter. Starting with phone models such as Samsung's Galaxy S8, USB-C replaced Micro USB. See
USB Type C and
Android dock.
The Smallest USB Socket
For years, Android devices such as this Galaxy S7 phone have used the USB Micro-B connector. See
Micro USB.