Follow along with the video below to see how to install our site as a web app on your home screen.
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If your cell data is "on" it should go automatically. "Data" is "data", just needs the internet path to send it. If it's a wifi only tablet, then no, only will go on wifi.
Might be a bug, try uninstalling it and install it again. There is no reason it shouldn't, make sure you have background data enabled.
