Question: what is the difference between iphone 7 a1660 and a1778?
Answer: Apple makes it seem like there are only two different iPhone 7 models -- the iPhone 7 and the iPhone 7 Plus. Beyond that, the only difference that's listed is the storage capacity. ... The A1778 and A1784 both use an Intel modem chip, while the A1660 and A1661 models both use a Qualcomm modem chip.