Info I just found out about the Htc Evo View 4G, using Intuit Gopayment credit card reader.
There are 2 types of readers, 1 for android tablets, and 1 for I guess android phones.
The one for the android tablets(HTC EVO VIEW) does not download to the tablet, if you search for it on the android market it will show the one for android phones.
Earlier this year I was able to use a cheap boost mobile Android phone as a tablet without activating it.
I just realized, this may not be the case with all Android phones out there. For example, I just found a Virgin Mobile Android phone that has much better specs than our current "tablet", and was thinking of getting a couple for my kids.