Yes you can unlock your samsung g600 by unlock codes and once you unlock your mobile you will be free to use any provider's sim in your mobile and after unlocking you will be able to send pictures to other mobile from your mobile..you will not lose any features which the mobile has default..try
superunlockcodes to get unlock code for your mobile and before unlocking your mobile you can get clear instructions about how to unlock your mobile for that you can visit
mobileunlockguide to get step by step instructions..