Originally Posted by TmR UK
What does NCS stand for?
Nokia Care Suite. Probably best to skip that idea if you don't know what it means
Anywho, i found this on the Nokia Support site:
Lumia 800 and Lumia 900:
You can find product code information from the label on the back of your SIM card holder, right under the QR bar code. For information how to insert and remove SIM card holder for Lumia 800, see your Nokia phone's user guide.
Lumia 610 and Lumia 710:
Remove the back cover and battery, and see the label on the battery holder. For information how to remove the back cover, see your Nokia phone's user guide.
Hope it helps.