How can i run the iphone 3gs app in iphone 4s
<p>i am developing one application for iphone 3gs with screen size 320X480.But i want to run that application in iphone 4s.But iphone 4s screen size is 960X640.And the iphone 5 screen size is 1136 x 640.So how can i run in iphone 5.If i run my application in iphone 4s or iphone 5 may i get any ui errors.Please tell me</p>
