iPhone 4 with A1387 code

[shc]

Hello,

I've bought an iPhone 4 from a friend, but while I did a bit of researching I found out that only 4S iPhone has A1387 model number on the back. However, my iPhone which use normal iPhone 4 firmware and has the 4 design(doesn't have two lines on the side) has A1387 code on the back? I was just curious how can that be ? Thanks.

 

[Nukemkb]

A replacement back?

 

[Tyler23]

Hello,

I've bought an iPhone 4 from a friend, but while I did a bit of researching I found out that only 4S iPhone has A1387 model number on the back. However, my iPhone which use normal iPhone 4 firmware and has the 4 design(doesn't have two lines on the side) has A1387 code on the back? I was just curious how can that be ? Thanks.

Back glass may have been replaced with iPhone 4S back.

 

[shc]

might have been replaced, i was wondering if there might be anything deeper than that thanks for help.