I don't think this is cheap but we used a Verizon hotspot called Jetpack. It was around $75-80 and the levels of data were (I'm trying to remember), $15 for one week of less then 1gb, $60 for 2gb, $90 for 4gb for one month. We didn't really use that much data but at the time we needed the max because we weren't sure where we would be on our road trip (campground, motel or hotel). And my husband needed to have good internet to work on the road. Look up the Verizon plans for a more accurate cost then my memory, this was a pay as you go kind of thing. Verizon was way better then when I tried a T-Mobile one two years before. We thought the higher price was worth it and it was absolutely,no regrets. Our trip was all over the USA and Canada over two months.