Can I use my iPhone 5 for Boost Mobile if it's factory unlocked?

Does boost mobile offer sim-cards? Because my phone was connected to my phone service via sim-card and I was informed that Boost Mobile does not use sim-cards. What are my options?

Boost is a CDMA carrier, no SIMs. Unlocked phones concern GSM phones on GSM carriers, eg. T-Mobile, AT&T.