Sprint iphone 5 using sim card?

Just upgraded to iPhone5 I removed the sim slot and it said no sim. So did I got factory unlocked iPhone 5 or all iPhone 5 is already unlocked.

IPhones on Sprint & Verizon don't use SIM cards since they are both CDMA networks. They have SIM slots for the benefit of if/when you need to put one in (usually in cases of international travel) where CDMA networks are not as plentiful or don't exist.

Only the Verizon iPhone 5 is factory unlocked besides the models that Apple themselves sell.

Nope, that's not factory unlocked, only Verizon iPhone 5 comes factory unlocked.

It is not factory unlocked.