The iPhone can be largely credited for the rise in popularity of real-time updates. Prior to the iPhone’s launch, mobile browsers were clunky at best, and virtually unusable at worst.
But the iPhone made it easy and even fun to browse the web from a mobile device. Add apps for virtually every social network to the mix and it became possible for users to update anytime, from anywhere.
Other phones have followed suit and there are now mutliple devices available that let users easily update their status on the go (including posting photos and video updates).
The iPhone has taken such a huge role in social media that there are now social networks only available on the iPhone. iRovr is a social networking app specifically for the iPhone/iPod Touch.