Brian, let me be the first to welcome you to the iFly family! A quick question - are you checking the ADSB weather while on the ground? If so, unless you happen to have an ADSB tower adjacent to your airport you won't see any weather updates.
FWIW, our usual approach to getting up to date weather in iFly is this - (I use the android version exclusively, other versions might differ a bit in their operation).
First we provide internet access to our tablets through my telephone's wifi hotspot. We next start iFly on our Android tablet and let it access the internet through our wifi connection while we do our preflight walkaround. This gives iFly a few minutes to access the internet and download current weather and notams. Before turning off my hotspot, I use the Mapmode menu to verify that iFly has downloaded the current wx info - it usually takes much less than a minute.
We then turn off the hotspot to allow the tablet to search for and connect to my ADSB receiver (a Stratux). One we're flying and can begin to receive ADSB info from the nearest tower we can check the ADSB status by touching the ADSB instrument - which will bring up the ADSB status info.
You state that you are using an Android device - it won't connect to more than one data source at a time. When your Samsung is connected to your uAvionics echo, it isn't connected to the internet, but that really isn't a case of the ADSB receiver blocking or preventing your Samsung from getting data from the ADSB device. For example, if you could maintain a consistent internet data connection while in the air on your Samsung, you'd get wx updates - but you would also miss out on traffic alerts which IMHO are priceless - hence the value of ADSB, wx, notams and traffic all rolled into one data source.