There are a number of reasons why you'll need to know what version of Apple's iOS your iPhone is currently running. Finding out is as easy as:
- Open the Settings app
- Tap 'General'
- Tap 'About'
- Scroll down and look for 'Software Version'
The value specified in 'Software Version' tells you what version of iOS you're currently operating.
Moving apps around on the iOS home screen has always been done with "wiggle mode". Once the icons are wiggling, they can be rearranged or deleted.
To delete apps or reorganize the home screen follow these steps:
Instead of long pressing an app to get it to "wobble" and then going through all of your screens and folders tapping the "x" on apps you want to delete, you can accomplish the same thing much more quickly via the App Store. Just open the App Store, tap on your profile/account button, then scroll down through your recently updated apps. Swipe left on any app you want to delete and you will see a Delete button.