What I'm trying to do may just be impossible, but I'd like to see if anyone has any ideas about how to make this setup work. I'm trying to set up my iPad as a point-of-sale system for processing credit cards at a convention. I have a receipt printer and cash drawer, and the receipt printer connects via ethernet to a wireless router. The iPad, when connected to the router via wi-fi works beautifully to print receipts and open the cash drawer (using the SquareUp app). However, at a trade show/convention, I will not likely be able to use that wi-fi router to access an internet connection. So, tethering to my iPhone seems like a good option, and I am able to do that to process credit cards. However, I am unable to connect my iPad to both the tethered connection and my wi-fi router at the same time. I assume this is a limitation of the iPad, but I'm hoping there's a setting that could possibly fix that. Does anyone know of any other options, other than purchasing an iPad with cellular data options? Even then, I'm not 100% sure that it could be on the wi-fi network while also on the cellular data.