AIR for iOS: iPad and iPhone Dimensions?

Question

Sorry if this has already been answered, but I couldn't find it in the forums here.
To run on the iPad, I built a 1024x768 stage-dimensions app in Flash CS6 (my app also has graphics which are 768x1024 for portrait mode).
I have this code:
stage.scaleMode = StageScaleMode.NO_SCALE;
stage.align = StageAlign.TOP_LEFT;
I know the iPhone 4 is 960x640, and iPhone 5 is 1136x640. 
My questions, since I don't have all these iPhones for testing:
1) Do earlier iPhones run in even smaller resolutions?
2) If I branch my app off to a section that also has 960x640 graphics, and if I do some device detection to direct to these graphics (when on an iPhone 4 or 5), will these 960x640 graphics still stretch to 1136x640 on the iPhone 5?  Or, will the iPhone 5 have a blank area for the extra 176 pixels?
3) Are there any known ways to best-handle the pot-pourri of iPhone resolutions?
Thanks for any direction on this.

Answer 1

you should get any resolution your app is running on with
http://help.adobe.com/en_US/FlashPlatform/reference/actionscript/3/flash/system/Capabiliti es.html#screenResolutionX
when targeting a wide array of resolutions Flashs default solutions are imo suboptimal.
On MacOSX there is sometimes the problem that you have to artificially delay the fullscreen event, otherwise it won`t work as expected.
If you are targeting iOS specifically that could be a problem, too.
this function generally works better, than using the NO_SCALE/TOP_LEFT combination:
function goScaledFullScreen() {
    var screenRectangle:Rectangle=new Rectangle(0,0,stage.stageWidth,stage.stageHeight);
    stage.fullScreenSourceRect=screenRectangle;
    stage.displayState=StageDisplayState.FULL_SCREEN;