mobile

Can someone please tell me where to find the SERIAL NUMBER for the LG GPad 8.3? I'm not looking for the IMEI number but the SN. I need to register my sons tablet with warranty company and they are asking for the SN. I've looked in the Settings under About Tablet and Status and it only gives the IMEI. I don't know where to find the actual SN. I have the box it was sent in and the paperwork but nowhere is the SN listed, only IMEI. Ugh!!!:confused: