I’ve been looking for an MVNO cell phone plan in the U.S. that offers data at a max speed of 512 kbps (or something similar that is fast enough for most legitim

I’ve been looking for an MVNO cell phone plan in the U.S. that offers data at a max speed of 512 kbps (or something similar that is fast enough for most legitimate uses, but a little painful), and I haven’t found anything. Seems like an opportunity. However, I can waste plenty of time on sites like this one, and it is functional on a 16 kbps connection.