OneSimCard
 

BAD DATA, good calls
I signed up for One Sim Cards calling and data plans for a three week trip to Europe.
The phone calls worked as advertised. The DATA NEVER worked. I attempted to contact their support without success. Naturally they are refusing my refund request for the data portion of the plan, sighting there published policy.

BE VERY CAREFUL WHEN SIGNING UP FOR DATA FROM One Sim Card.

Did it come with a free US number for a month and did you use it?
Or rather did other people use it to contact you?

Since you are in the U.S., wouldn't it have been cheaper and easier to simply get a T-Mobile account for a month with free data and text and 20¢ calling? $10 or #20 for SIM and $50 a month for one line, #30 for the 2nd line.