Sorry to say , sprint can tell when your device is rooted, all they do is swap screens, power it up and by no means is it too late to reject the repair if it's rooted, thing is it will still get replaced but it will be heavily noted that the device was rooted, that way customers wont keep BRICKING they're devices and saying , "oh i dunno wut happened, it just went dead", the techs know you broke cause you weren't paying attention, either way it can still get replaced and sprint will swap the screen.......
