Just a note here to report that the Dexcom G5 does not work on the new android Samsung 9 and 9+ phones. I never thought it would be an issue when I bought the new phone. I figured it would be OK as the S8 used the same android version as the new S9, and the S8 is an approved device.
From what I have read on the internet, Dexcom may be working on a solution but no information about when the new version will be cleared for use. In the mean time I have to carry two phones now to use my G5. I carry my old S7 phone to communicate with the CGM with wi-fi connected to monitor my BS and I carry my new S9+ to do all the other cell phone functions. Even though cell phone service from my old phone has been disconnected and transferred to my new phone, the old phone still talks to the CGM.
Of all the other apps I use on my S9+, the Dexcom app is the only one that does not work. If you plan to purchase a new S9 or S9+ phone you may want to wait until Dexcom allows your phone to be compatible with these devices.
I never could get my Dexcom receiver to work after I started using the android phone app, so I can’t do that.