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How to use Samsung DeX with Galaxy S9 and S9+?

A Definitive Samsung DeX Guide

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A Definite Samsung DeX GuideSamsung DeX lets you turn your Galaxy S9, S9+, S8, S8+, Note 8 or Note 9  into a PC with a big screen, a full-size keyboard and a mouse.

For Galaxy S8, S8+, S9, S9+ and Note 8, a Samsung DeX station or Dex Pad is needed to use the DeX mode.  For Galaxy Note 9, a USB-C to HDMI cable is sufficient.

This Samsung DeX guide explains the details of the Samsung DeX, shows you how to use Samsung DeX, answers questions you may have on Samsung DeX.

This guide applies to Galaxy S9, Galaxy S9+, Galaxy S8, Galaxy S8+, Galaxy Note 8 and Galaxy Note 9, although most of the screenshots were taken from Galaxy S9.

What is Samsung DeX? What do you need to use Samsung DeX with Galaxy S9 and S9+?

For Galaxy S and Galaxy Note phones, it is always easy to connect to external monitor or TVs using a micro USB MHL adapter (for Galaxy S or Note devices prior to Galaxy Note 7 with a micro USB port), or a USB C to HDMI cable (for Galaxy S or Note devices with a USB type C port like Galaxy S8, Galaxy S8+, Galaxy Note 8, Galaxy S9, Galaxy S9+ and Galaxy Note 9).

In addition to MHL support, Samsung also incorporated Micracast support in most in these devices. In recent versions of Galaxy S and Note devices, the Miracast support is limited to  Samsung’s implementation only.

So, for Galaxy S9 and S9+, you can use at least following three methods to mirror the phone screen to A TV or external monitor:

  • Use a USB-C to HDMI cable.
  • Use Miracast to cast the screen to a Samsung TV or monitor through WiFi direct.  It may not work with other brands of TV.
  • Use Chromecast to cast the screen through a wireless router.

But all these connections between Galaxy S9 (or S9+) can mirror the screen only.

Samsung DeX can do more than screen mirroring.

In a nutshell, Samsung DeXconverts your Galaxy S9 or S9+ to a PC (Android PC) with a Samsung DeX station or a DeX Pad.

Both Samsung DeX Station and DeX Pad have:

  • Two USB ports.  You can connect a wired or wireless mouse and keyboard to it.
  • A USB C port.  You need to connect the fast adaptive charger to it to power up the
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