I purchased a case which said iPhone 4S in the title. I plan on preordering the 4S with AT&T. I'm pretty sure it will fit since they did not say anything about physical external changes to the iPhone 4S and it looks just like the iPhone 4 for Verizon. If anyone can confirm that would be great. Case I purchased on Amazon On an unrelated note, do Verizon / Sprint customers receive an iPhone 4S with a SIM card slot? What happens when the ESN is bad? Will an AT&T SIM card still work?