Got a dollar and an iPhone? You can try out a new Samsung smartphone.

Samsung's latest promotion lets anyone with an iPhone and 100 pennies, two quarters, or a single dollar bill "test drive" a phone for 30 days.

Dubbed The Ultimate Test Drive, participants receive a kit with the smartphone of their choice, an activated SIM card, and step-by-step guide. After 30 days, the choice is yours: buy the Samsung device, or return it in favor of your iPhone.

According to the company's website, the promotion is limited to "our latest Galaxy phones"—the Galaxy S6 Edge, S6 Edge+, and Galaxy Note 5 .

To sign up, visit SamsungPromotions.com from your iPhone's browser, select your carrier (AT&T, T-Mobile, Sprint, or Verizon), and pick which phone you want to try out. In a brief test this morning from an iPhone 6, however, the website said that none of the phones were available.

The move comes as Samsung struggles to compete with Apple's iPhone. Samsung was the No 1. smartphone vendor during the second quarter, with 21.9 percent of the market, Gartner said this week. But that is a drop from 26.2 percent during the same time last year. The business sold about 72 million smartphones in Q2, but 76 million last year.

T-Mobile last summer launched a similar promotion: Teaming up with Apple, the mobile carrier offered a free, one-week test drive of the iPhone 5s—no cost, no commitment.