Porting existing game to iphone5

i have a 3d game developed in unity 3.5 for iPhone 4, 4s and iPad. it is running well.
now we want to port our game on iPhone5 and iPad mini . as resolution is changed.
how should i start , how much effort will be needed…
i am new to unity development, but exprienced in ios. plz help

Change your game window (in unity) to the iPhone5 resolution, and you’ll see how it will look.
iPad mini has the same resolution as iPad 1 and 2.

Does Unity 4 have the iPhone 5 resolution? Unity 3 only has the iPhone 5 aspect ratio.

Nope. Still no pixel correct viewport available, probably too hard piece of code to copy/paste from earlier versions. Your options are to manually adjust the viewport, and try to find out when it’s in correct dimension, or switch platform to for example web and input the pixel dimensions there and see how it works, or run it in iPhone 5 simulator / device.

You can manually resize the gameview to the iPhone5 resolution , as long as the gameview is standalone/has it´s own window.

Doable, but very annoying.