As one of its daily deals, All4Cellular offers this Screen Protector for iPhone 4 / 4S 6-Pack for free plus $2 for shipping. (Add two 3-packs to your cart to get this quantity/price.) That's tied with our mention of a 3-pack of screen protectors from last week and the lowest total price we could find for this quantity now by $2. It includes six front screen protectors and six back case protectors. Deal ends today.