Hi and tnxs for reading.
Other posts are talking about iPhone6 and 6 Plus screenshot size for iTunes Connect
iPhone 6:
750 x 1334 pixels for hi-res portrait
1334 x 750 pixels f
My understanding at this point is that you have to photoshop the status bar out.
I looked at Uber's app, and they had the status bar in there, with the time stamp and wifi bar.