I tried but it doesn't work, and I'm surprised and I didn't know Verizon block it, the cellphone what I bought is unlocked but it's operator was Verizon
Yes, Verizon especially, is notorious for blocking those codes. If Verizon's firmware is still on the phone, you will not be able to use the codes. You have a couple of options. Return the phone because it does not do what you want it to do (however, if the phone otherwise functions normally, you might want to keep it), or take it to a Samsung service shop and have it flashed with new firmware to be factory unlocked. Then, likely, the codes will be usable if your carrier supports them.
