There is a free iPhone case available from Sephora with no purchase neccessary.
You just download the Sephora to go app and show it to an employee in store.
If you prefer to get it online, it is free with any purchase. Just head over to Sephora and use promo code: MOBILE3 (for the 3G) or MOBILE4 (for the 4G).
Looks like purchase is required 🙁 http://www.sephora.com/go/iPhone/;jsessionid=W4NHGCJG3Y0TMCV0KRRQQAQ
Diana I read that to mean a purchase is only required if you order it online.