The SN is in the battery compartment. The problem is that Kies doesn't recognize the 530T1 but will the 530T. Finding firmware for the T1 that works is a challenge. Hardware is the same but if you use Odin to flash T firmware on the T1, it will fail. If you fool Kies by using the T model number and the SN in the link, it will flash the T firmware on the T1 device.