I have an application written for iPhone 4s screen resolution and below. Now I would like to migrate it to iPhone 5 screen resolution. I read a lot of answers online and I am pretty much clear with the procedure now.
What I would like to know is whether I need to have the latest version of Xcode to perform this migration. As far as I can see I can do all of the procedures using Xcode 4.2 itself, but most of the answers suggested I need to download the latest Xcode. If its really needed, Please let me know the reason behind this.