I suggest you assume it will lock the radio until you discover definite information to the contrary.
Some modern radios don't have a security code as they are programmed with the VIN number and won't work unless they see the same VIN in the vehicle security system so if everything is good and the right radio is fitted in the right vehicle the radio will work.
Lots of coded radios have the facility to cancel the code - but you need the code to activate that facility. I guess you don't have the code. Buyers of cars without the code(s), literature, spare keys and suchlike should be entitled to large discounts to compensate for all the trouble it causes...
Answers & Comments
I suggest you assume it will lock the radio until you discover definite information to the contrary.
Some modern radios don't have a security code as they are programmed with the VIN number and won't work unless they see the same VIN in the vehicle security system so if everything is good and the right radio is fitted in the right vehicle the radio will work.
Lots of coded radios have the facility to cancel the code - but you need the code to activate that facility. I guess you don't have the code. Buyers of cars without the code(s), literature, spare keys and suchlike should be entitled to large discounts to compensate for all the trouble it causes...