Samsung Galaxy S3 unlocked works for every network. ?

I dropped it on the floor once and the glass is cracked but the screen is fully functional. i dropped it a week a go and since then i been trying to see if there are any other damages and there are not. everything runs as it should , the screen works as that the crack is not there. You will be able to see the crack only when the screen of the phone is off, while is on there is no difference. if you want to change the glass is about 180 to 150 ponds. i have the original box which includes the charger, the headphones and the user manual. the phone as i mentioned above is unlocked so is fully operational for all networks. PHOTOS SOON BECAUSE I CANT UPLOAD THEM NOW.