I would believe so, it can be difficult to unlock your iphone though but the iphone is exclusively at tmobile in Europe.
If you unlocked your iPhone it is easy to access apps store all you need is a account to download thinks from there,if you jail braked your iPhone you may download thinks through cydia only .
Yes
Yes, wether the iPhone is legally unlocked or jailbroken-unlocked.
Download installous on iPhone (In the IPhone Store)
download them from the apps store
The App store :)
By the time I answer this question there are ~285,000 iPhone / iPod Touch apps on the iTunes App Store.
Of course you can in the app store there are tons of free apps
There is an App Store on every iPhone. You download them from there (:
There are hundreds of millions of free iPhone apps of the App Store, so it would be unnecessary to list them all. You can access the app store and look under "Free Apps" to browse them.
The apps from the Apple Store will only work with Apple's iPhone and iPod Touch.
apps from an itouch, iphone, or ipad can very. check the app store to see all the apps