Editor’s note: This First Take includes only the features that will be unique to the iPhone 3G S. I’ll revisit iPhone OS 3.0 in a separate post, so check back on Tuesday, June 9.

iPhone fans got what they were waiting for June 8 when the third-generation model of Apple’s popular handset made its debut during the WWDC 2009 keynote. The iPhone 3G S, which will hit stores June 19, promises a faster iPhone with an extended battery life, more memory, and improved features. It looks exactly the same as the previous model, but both the 16GB ($199) and new 32GB ($299) models will come in white and black versions.

Though the jump from the iPhone 3G to the 3G S isn’t quite as big as the jump from the first- to second-generation models, this latest handset still adds enough new features to make it a compelling upgrade for some users. And when you add in all the new features that will come with the iPhone OS 3.0 (available June 17), we finally get an iPhone that can run thousands of snazzy applications and do something as basic as send a multimedia message.

Yet, we still have some concerns. A faster AT&T 3G network isn’t going to happen overnight, and some features, like tethering and the aforementioned multimedia messaging, won’t happen right away. We also came away from the keynote without any mention of call quality, which, as any iPhone owner can tell you, remains far from perfect. But most importantly, the iPhone 3G S’s price will vary widely depending on your eligibility. If you can get it at the lowest prices, it’s worth your while. But if you’re not yet eligible for a discounted upgrade, we suggest that you wait.

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Originally posted at iPhone Atlas