Normally, the new AppleCare+ can only be bought simultaneously with its iPhone 4S. But if you bought a 4S already and didn’t get AppleCare+ with it, you have until November 14 to change your mind:
Through November 14, AppleCare+ can be purchased by customers who:
- Pre-ordered iPhone 4 (8GB) or iPhone 4S
- Purchased an iPhone (any model) on or after October 14, 2011 (proof of purchase date may be required)
Contact us at 1-800-275-2273 to purchase AppleCare+.
I just did.
(For other Apple products, you can generally buy AppleCare anytime during the first year of ownership, while Apple’s standard warranty still applies. The iPhone 4S is the first Apple product I’m aware of that requires the warranty to be purchased at the same time as the product it covers, probably due to practicalities with fraudulent claims on its accidental-damage coverage.)