It was a huge pain to find that plan on the desktop web site. I hadn't looked in a while but I thought that T-Mo had offloaded all of its prepaid plans to an M

It was a huge pain to find that plan on the desktop web site. I hadn't looked in a while but I thought that T-Mo had offloaded all of its prepaid plans to an MVNO. I didn't know this plan existed. I might try to get it now, at least for 1 month, though T-mo coverage is crap in my area. If you're willing to deal with an annual plan through an MVNO and buy through ebay(!), this is the cheapest I know of, starting at $30/year ($2.50/month) with 200MB: https://www.redpocket.com/plans/ebay https://www.redpocket.com/plans/ebay 200MB is more mobile data than I use most months since I mostly use a laptop and/or wifi (I use mobile data for occasionally checking email or directions or browsing low-bandwidth sites like HN when bored). YMMV. They have larger plans too. I have their now-defunct $10/month plan on AT&T. Redpocket is not the greatest but it's legitimate as far as I can tell.