The iPhone OS 4 announcement was monumental. It’s bringing the long-awaited ability to multitask along with some customization options, organization options, and new search and content management features all over the operating system. It’s a fantastic update, but not everyone will be reaping the full benefits. In fact, the majority of the iPhone user base won’t get to all those new goodies.

Apple has only approved the 3GS for a full OS 4 feature rollout. The original iPhone won’t get OS 4, period. The 3G will only get parts. Though it’s probably still worth it to make the upgrade, you’ll be missing the multi-tasking, the custom home screen backgrounds, and potentially some of the other processor intensive features. It’s not that big a surprise (though the wallpaper thing did catch me off guard) – the 3G has some trouble with the current OS – but it still sucks.

It points to a problem that has longed plagued Apple customers – the update cycle. For Apple as a company it’s worked quite well. What better way to stick it to your fanboy friends than getting the newest version of that thing they’ve been hyping to you for six months. Hell hath no fury like a fanboy bested.

The iPhone touched down in China this past Friday night missing one big feature: Wi-Fi. China’s second largest mobile carrier, China Unicom, has an exclusive three-year deal with Apple to sell the phone.

Starting out sales might not be the runaway figures Apple saw in the US. After all, it’s not that tough to get phones from other markets. Phones that include Wi-Fi. There have also been rumors that China Unicom hopes to sell Wi-Fi capable phones within a few months, giving Chinese consumers even more reason to hold off on buying one now.

There was still a modicum of Apple fanaticism to be had, though. The country’s first iPhone owner, Zhi Xianzhong, waited almost eight hours to buy the phone.

This is the month of phone hype, beyond a doubt. We’ve seen the Pre release, Nokia’s super-expensive N97 spot with LL Cool J, iPhone OS 3.0, and now the iPhone 3GS. Of the phone launches, the biggest is certainly the update iPhone, though it may have come more quietly than the world expected.

Lines outside Apple’s flagship store in NY reached several hundred, but amidst some rain, they were all shuffled under Apple’s roof making this the smallest iPhone launch yet. Still, AT&T reports hundreds of thousands of preorders for launch day, which dwarfs Palm’s Pre 50,000 first weekend statistic.

It wasn’t just scale that kept the launch quiet, though. In part, it was a lack of hangups that have plagued Apple’s past launches. Apple announced both iPhone OS 3.0 and the iPhone 3GS at WWDC this year, but the set the launch days two days apart. The staggered launch was presumably to reduce server load so that new owners weren’t trying to activate their 3GS while 20 million others were waiting for OS 3.0 downloads. It was a smart move, and it kept problems with the 3.0 release and problems with the 3GS launch (so far, at least) to a minimum.

Now the focus shifts to AT&T and how their network will handle more users hoping to see the wireless carrier make good on promises of MMS and tethering. Will MMS from iPhone users bring the sole US carrier to its knees later this summer?

We already posted a how-to for enabling tethering on your shiny new OS 3.0. While awesome, it is clunky, slow, requires a mac… yada, yada, yada.

Leave it to iClarified to give us a handy and simple way to enable tethering right from the phone. All you have to do is use Safari from the phone and navigate to a specific website. Click a link here, say yes there, and next thing you know, tethering is enabled on your iPhone.

I know someone, who knows someone, who did it (wink, wink) and it was as easy as pie. Click through and try it for yourself. Let’s just say I know it works.

Most of the bad news coming with the iPhone OS 3.0 release is from AT&T, the iPhone’s sole US carrier. Despite most every other iPhone carrier in the world enabling tethering and MMS today, AT&T did not, much to her users’ chagrin.

The software is there, though, and it’s taken less than a day for someone to figure out a hack (for tethering that is – MMS has been around since the first jailbreak). The guys at MacMegasite have a quick and dirty tutorial to get the thing running. In short, all it requires is that you download a carrier settings file and perform a defaults write command in a Mac terminal. Restore your phone while holding option down and you can add the carrier settings update without messing with the rest of your phone. Head to “Network” under your general settings and you should see tethering, with options for USB and Bluetooth functionality.

Early reports suggest things are a little slow, and I have yet to read of a successful PC mod for this. Still, good work from everyone involved with this (seems like MacMegasite, Gizmodo, and AppleNova for some quick credits). Have you tried this yet? Did it work for you?

Full tutorial here.