Should I purchase a 4 or 4s replacement battery?
I purchased a refurbished iphone 4. The back panel has the model A1387, which is the model# for a 4S. The phone is 4 though, there was no option for Siri when I set it up. So I'm guess they just used the back of 4S replace a broken one.
I need to replace the battery. Should I order the 4 battery or the 4S? Or is there another way to tell what's on the inside without opening it?