r/SamsungDex

Hi everyone,

I'm working on a DIY project and I'd like to know if there are any technical limitations before I invest more time and money.

The idea is to build a dockable tablet where my Galaxy S23 Ultra acts as the entire computer. Instead of permanently installing the phone, it would slide into an internal dock inside the tablet enclosure and remain fully removable.

The planned hardware is:

• Samsung Galaxy S23 Ultra (removable dock)
• 10.1" 1920×1200 capacitive touchscreen
• USB-C DisplayPort Alt Mode (single USB-C connection for video + touch)
• Internal battery (likely using a modified power bank)
• Internal stereo speakers
• Camera cutout so the phone's rear cameras remain usable
• Custom 3D-printed enclosure

The goal is that I can simply dock the phone, have Samsung DeX launch automatically, and use it like a regular Android tablet. When I need my phone again, I just undock it and take it with me.

I have a few questions:

1. Does DeX work reliably with USB-C portable touchscreens that use a single USB-C cable for video and touch?
2. Can DeX be configured to launch automatically every time the phone is docked?
3. If the display is externally powered, will the phone charge while running DeX?
4. Has anyone experienced touch latency or compatibility issues with USB-C touch monitors?
5. Would heat become a concern with the phone enclosed inside the dock during extended DeX sessions?
6. Is there anything important I'm overlooking before starting this build?

I'd really appreciate any advice from people who use DeX regularly or have experimented with similar DIY projects.

Thanks!

I'm trying to figure out if this is expected or if I'm missing something. My setup is Galaxy Z Flip 6 on One UI8.5, connected' by USB-C to a Dell P3225QE monitor, the same cable works perfectly with my MacBook Pro. With the Flip6, I only get screen mirroring. I don't see Samsung DeX in Settings - no quick tile either. Has anyone gotten Dex working on a Z Flip6? If so, what setup or monitor are you using? Or is mirroring the only supported option? Thanks!

I recently discovered something interesting while using Samsung DeX.

Blood Strike seems to detect when you're playing with a keyboard and mouse through DeX (or a keyboard and mouse connected to your phone) and automatically places you into PC lobbies instead of mobile lobbies.

I tested this on multiple phones several times, and every time I connected a keyboard and mouse, I was matched with PC players. It didn't matter whether cross-platform matchmaking was enabled or disabled. Aim assist was also completely disabled.

I'm curious if anyone else using Samsung DeX has experienced the same thing. Is this an intentional feature, or has anyone found a way around it?

I forced DeX to open on a budget A-series phone using Shortcut Maker, proving the code is already there—Samsung needs to optimize this and grant us A Series users at least a lighter version, such as DeX Lite

My HDMI to USb type c is too short and I don't have the calories to get up and do stuff.

Is there a wireless transmitter that would let me operate dex ?

Hello!

In 2017 I pre-ordered Note 8 and got a Dex station as a gift (the black rounded device).

If anyone is wondering, yes the station works with S26 Ultra too! :)

So if you have an old Note or wanting a new S, and are wondering if it works, yes.

Have a good one boys!

Loving using dual screen dex with an external monitor on my S11 Ultra. It's almost replaced my laptop entirely as I can do 99% of work in just a browser.

Biggest nitpick is that my Ugreen 4k60 hub (+ USB A and TF ports) jumps my power draw (tested in DevCheck app) from ~2w to ~5w. I dont even need hdmi or anything else plugged in. It just adds 2-3w of power draw sitting idle.

The difference is barely getting through 8h workday and needing to charge at home vs ending the day with 30-40% if I didn't use the external monitor.

There is technically no reason why I can't charge it during the day, but moving around a lot makes it annoying to also get out and pack up my adapter every time.

If anyone else have different usb c hubs and can measure higher or lower power draw compared to my hub, i'd love to know. I'm temped on buying a straight up usb c to hdmi without a hub.

I've tested this both on my LG 4K TV and my 4K Monitor. UGREEN Revodok Pro USB C Hub with 4K60Hz HDMI, 10Gbps USB C&A 3.2, 100W Power Delivery. I have a 100w power adapter going into it.. when i plug into both tv or monitor, it shows 4k signal, but its locked to 30hz and in both instances i have black bars, for 16:10 ratio, makes black bars top, bottom and sides.. for the tv its just the sides. Has nothing to do with aspect ratio, autoscan.. it is the active signal that is wrong.

This hub on paper, should be compatible, or am i missing something.. i've tried two different hubs that both say they fully support 4k 60hz, but to no avail.. only USB C to C has worked.

Visit the UGREEN Store

Hi all

I'm looking for a PM with touchscreen, battery and also wireless connectivity please, pretty please!

Been looking high & low and one's with all 3 seem to be scarce and the search parameters of the usual suspects do not help!

Not looking to spend a fortune but know i may have to pay a bit more for all 3, any suggestions gratefully received.

Thank you

Last weekend I dropped my phone, it slid, and it's cracked in the top right corner. Que white flashing in the corner, general shadowing/layering, and flickering on my screen. I'm not stressed bc I know I have Dex to ease the burn of needing to buy a new phone in this market.

• I get home and connect the phone to my dell docking station (usb c). At this point I can still see and touch whats on my phone screen, it's just super layered. I removed the biometric and pattern security- it's just swipe to open. I can use my logitech peripherals (can connect via bluetooth and wired) to navigate Dex on my computer screen.
• Within 36 hours the phone screen is just black, I connect my phone to the station, dex runs, but after 2-5 minutes or so my mouse and keyboard stop responding and the light indicators (for screen 1/2/3) start flickering, as if it doesn't detect a device. Somehow my phone screen is able to act as a trackpad (never noticed this before). I cant type anything since I cant see the keyboard on my phone, but w.e. I can use apps.
• Now 3 days after the drop I can still reach dex, but the peripherals are still disconnecting after a couple minutes AND now I can't use my phone as a trackpad, even though I know the screen is on bc I get a response when I click the home/back button area.
• I tried connecting the logitech mouse and keyboard to the docking station via usb c and there was no response on Dex (tried different cables and ports on the station, then verified they can work by connecting them to my laptop directly and using the hub (disconnected my phone for that).).
• I plugged in an older, wired usb A keyboard and there was no response on day 2 or 3.

Is there some dongle I need to make this work? I recall using a white usb c to usb A adapter dongle for my S10. The only thing I havent done yet is let the phone's battery run down, then try turning it on again.

What I mean by this. I was using Swiftkey. However on android desktop mode. Completely broken.

However g-board works very well on android desktop mode. So what other versions of basic apps or additional apps I can use..

Also sidenote I can't seem to access The google playstore in desktop mode.

I'm using a huawei mate 20 x. And there equivalent of this is called Easy Projection.

Folks, just wondered if anyone would be interested in helping me test a new app I've been working on.

Essentially its an MP3/Music player heavily inspired by the MP3 players of the early 2000's with a few choices of control scheme which mimic the popular players of the era (iPod, Zune, Zen, etc).

Its got integrations with SMB/network shares to sync music and playlists and EQ, Cover Flow and even the ability to play video like in the old days!

If anyone fancies trying it let me know and I'll share a link! Its DEX compatible.

My goal is to connect a Galaxy Tab S9 FE LCD screen to hdmi and hdmi mini female connector. I've tried to find the LCD panel's model number to connect it to a lcd controller, but from the little bit of research I did. It has a integrated display driver/controller IC built directly onto the display's ribbon assembly. So could I connect this directly to a hdmi and hdmi mini female connector? Or would I still need to find a lcd controller that is compatible for the screen?

Also if anyone has the lcd panel model number for the galaxy tab s9 fe that would be amazing. Its in the review device information settings. Thanku <3

Just having fun and well learning a new thing. :-)