Using the usb cable it comes with you connect it to your computer and open iTunes. From there click "Update" and it will download and install the newest iPhone OS version for you.
all the features that are mentioned is available with the iPhone 3gs
depends if it has 4.os update
go to itunes click check for update
OS=Operating Systemyou are basicly saying that how much is iPhone 'operating sytem' 4 which is well free you can download the OS update free from itunes however if you was meant to say how much is iPhone 4 well I'll say iPhone 16gb between £400-£500 but it depends what shop it is
go to itunes...plug in your deviceopen up itunesand check for updates
iPhone OS. No seriously it's actually called iPhone OS.
The first major "update" for the iPhone was iOS 2 (formerly known as iPhone OS 2), which ran on both the first and second generation iPhones and iPod touches. There were many small changes brought out in this update, but the most significant was the introduction of the App Store, allowing iPhone users to do more with their phone than just what Apple supplied them with native apps.
The exact release date is 17th June 2009. To find out more go to apple.com/iPhone and you'll see info about iPhone OS 3.0 and the new iPhone 3G S. Which is the new iPhone with voice recognition and video recording.
The OS 8 is for the iPhone 4. The iPhone 4 is a really popular phone.
plug your iphone into your computer and go into itunes click on your phone under devices go to summary and press check for update or update iphone.
The iPhone, along with the iPod Touch and iPad, run iOS, previously called iPhone OS.
No.