Sprint is feeling out the response to a new plan offering one line of unlimited service for $60 per month in one of “many” trials the carrier is testing across its markets.

According to the trial plan’s landing page, Sprint is offering customers in Milwaukee and Boston one line of unlimited data for $60 per month, with the ability to get a second line of unlimited data for just $40 per month more. The offer also includes additional unlimited lines up to 10 lines for $25 per month.

Users on Reddit also noted Sprint is testing a similar plan offering the first two lines of unlimited at $50 each in other areas of the country.

Sprint’s current unlimited plan runs users $75 per month for a single month with a second line at $45 a month and additional lines at $30 per month.

For comparison, T-Mobile currently offers unlimited plans starting at $140 per month for two lines. AT&T also offers a single line of unlimited for $100 per month with additional lines at $40 per month, for two lines at $140 per month, but that offer is only available to DirecTV and U-verse subscribers.

During the carrier’s second quarter earnings call on Monday, Sprint CEO Marcelo Claure said the offers are just a handful of the “tens of trials across the market” Sprint has underway. Claure said the real-life trials are the “most effective way to test anything.”

“Unlimited has been one of Sprint hallmarks and we believe it is very attractive to a certain segment of the market,” Claure said. “So we will continuously test price elasticity to see how could we do it to increase our sales.”

At this point, though, Claure said the offers are “nothing more than just a test” and said it’s “too early to tell” what the carrier’s next national promotion will be.