I am trying to layout my xib so that layout fits in both iphone 5 (4 inches retina) and 3.5 devices. 

Because I have to support IOS-5 I cannot use autolayout. I have to use springs and Struts.

I tried everything in interface-builder. But either my view is going beyond the bottom of iphone-3.5-inch or not filling completely the iphone-4-inch-retina. 

Can someone give a hint how to actually make an xib compatible to both the devices?

For more clarity I am adding screenshots:

When I set size 3.5 in attribute inspector:
![When I set size in attribute inspector to 3.5](https://i.stack.imgur.com/RusNY.png)

it looks in iphone-5. There is a space below the buttons:
![And this is how it looks in simulator for 3.5 inch device](https://i.stack.imgur.com/UXwqx.png)

If I set size 4 inch in interface builder. You can see that bottom buttons are not visible in iphone-4.
![If I set size 3.5 inch in interface builder](https://i.stack.imgur.com/m2TO7.png)

So you will ask what are the settings I am using. Here are they:

![enter image description here](https://i.stack.imgur.com/qHQR9.png)
![enter image description here](https://i.stack.imgur.com/5yJ37.png)
![enter image description here](https://i.stack.imgur.com/cTZ8A.png)