Identify Your iPhone

Do you know if your phone was originally sold for a cellular network outside the US? If not, parts other than logic boards of these models are interchangeable.

My phone was originally sold for a cellular network inside the US, most likely Sprint or Verizon. Phones for KDDI in Japan are an exception and are included in this group.

My phone was originally sold for a cellular network outside the US (other than KDDI in Japan).