Can't tell if HTC One V is GSM or CDMA

I recently won an HTC One V and I want to sell it, but I'm not sure what carriers it supports. I won it from an HTC stand I went to, and all they said was that the phone was unlocked so that it could be used with any carrier. How can I tell if it's CDMA or GSM? I can't remove the cover to see an ESN or HEX number, and I don't see any spot for a SIM slot. On the label of the phone it has an IMEI number, an S/N number and a P/N number. Any ideas? I see listings on ebay that say GSM and other listing that say GSM/HSPA. How do I tell?