Although not exactly what you asked for, one thing I would suggest you consider is the $30 prepaid Tmobile plan that I use. It is available only with either online new activations or through walmart but I suggest just doing it online at the tmobile prepaid site. It is unlimited data, including 5GB of LTE, unlimited text, 100 minutes talk. So while technically a phone plan, it is really focused on data and provides a good amount of LTE for the price. This is an easy way to get a phone on what is essentially a data plan with perks.
I would do this, personally. It's about the same price as a data only plan and you don't have to worry about data overages.
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