i actually just learned about extended warranty with credit cards recently (i know i'm slow ) and after reading up about it have decided to buy my iphone5 with an amex rather than my chase freedom, even knowing i could earn 5% back in october with the freedom at best buy where my phone has been reserved. my iphone4 is somewhat dysfunctional after having been dropped and i've been suffering with it for the last many months. of course i'm still too cheap to buy apple's warranty but from what others have reported amex seems to have a great extended warranty program so hopefully i wont have to suffer again if i have a problem with my iphone5 after the warranty ends (and before i'm eligible for another upgrade )!