SIM Card?

Hello everyone. I'm new to this site. New to forum's. I have an issue regarding my Samsung galaxy phone my fiance got me bc my other phone broke. I was wanting to put my SIM card in and can't figure out if it even takes a SIM card? The model number under the battery is SCH-R7-40C. Can anyone help me out? I'm using wifi on a friends phone and MUST have a phone for work. Thank you