Update 2018-Dec-11: I’ve spoken to a LoD team member and to jump straight to the point of you have a LTE Tab S4 then simply put the required update isn’t available at this time and there is no information on when it will be available.
Some people trying to install Linux on Dex are running into an obstacle. After installing he app and trying to run it they get the following error message.
Linux on Dex requires your device to have the latest software o support some features.
After this message is acknowledge the application closes. If someone with this error checks for updates in the app store or for updates to the operating system they get notification that everything is up to date. What’s going on? I contacted LoD support about this and got back the following response.
Currently, the Linux on DeX(beta) requires latest SW for Galaxy Note9 and Galaxy Tab S4.
SW update schedule may vary depends on the region and carrier.
What does this mean? It means that your device doesn’t have a update that is required for DeX and that your carrier might not have released it. Devices sold through a carrier can be a bit slower in receiving their updates. Samsung hasn’t been specific on the updated needed. I’ve communicated with someone on the Linux on Dex team and was told that LTE tablets in general do not have the update that is required for Linux on Dex. Additionally the person told me that there is no information available on when particular updates will work their way through certain carriers.
BTW: Unlocking your device and installing a SIM from another carrier will not change this; this behaviour is dependent on the carrier for which the device was made, not on the SIM that happens to be in the device at the time.