Charge your Samsung smartphone or tablet with a Samsung USB-C cable. All new Samsung devices have an oval USB-C port. Only for older smartphones do you sometimes need a micro USB cable with an angular shape. Make sure to check your charger before you buy a Samsung cable. Does your charger have an oval USB-C port? Buy a USB-C to USB-C cable. If your charger has a square USB-A port, choose a USB-A to USB-C cable. Go for a sturdy nylon or Kevlar cable if you want the cable to last long.