And while the board looks similar to the one that graces the inside of the Apple iPhone 5s, there are some subtle differences, including a longer piece that is situated where the top of the device would be. That would seem to be another confirmation that the iPhone 6 will employ a larger screen.
Screw holes in the logic board match up with previous leaks that we've seen of the iPhone 6 rear shell, confirming the authenticity of both parts. We expect to see the 4.7 inch Apple iPhone 6 unveiled in September with the 5.5 inch variant getting introduced the following month.
Leaked logic board for the Apple iPhone 6
2. Leaked logic board fits perfectly into leaked iPhone 6 rear shell
source: NWE via MacRumors