To set an image as a wallpaper go to Settings>Wallpaper>select the picture you want>select Lock Screen.
If you mean the wallpaper then you have to download a wallpaper app then download the shelves wallpaper you like from there. Then go into settings and select it as you wallpaper
Altough there is no radio application on the iPhone, you can download it. with the "App Store" program in the iPhone, you can download an app that gives you the opportunity for listening to radio.
Yes, there is an Answers App for iphone in the apple store
There is no way to do that. If you jailbreak your iPhone there is an app on Cydia that does that.
for an iphone there's already an app called safari which is the internet
Yes, you can find your lost iPhone with an iPhone app. However, you must have access to another apple product with the same app to locate your lost iPhone. It's called FindmyiPhone in the app store, and it's free. All you do is make an account. Let's say your iPhone is lost, all you do is sign in with your account with another device with the same app and the app will do the rest. Its quite amazing.
It already did. The Farmville App is available on the App Store now.
The best app to watch movies on your iPhone is Popcorn Time.
the best way is to use the find my iphone app
In the app store. You can get into app store by plugging your iPhone into your PC and open itunes or just tap on the app store icon in your iPhone, but you have to have wifi to buy apps wirelessly.
No you can not share iPhone apps.
No