Speaking of mobile hotspots, that's an option as well. If your mobile plan doesn't support sharing a data connection you can purchase a prepaid mobile hotspot from any of the major carriers. The hotspot device can be had for well under $100 and then on top of that you pay for the data you intend to use — from a couple of hundred megabytes to many gigabytes. These devices allow you to share the connection among five to ten computers and mobile devices (depending on the model). Before you commit to a prepaid plan check coverage maps for these devices to be sure that the hotspot will work where you are. (You might also want to call ahead and ask someone in the area how good their reception is given that coverage maps can be inaccurate.)
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