How to sync your iPhone photos with one Mac, but sync your iPhone videos and music with different Mac

If you have an Apple Mobile Device (iPhone, iPad, or iPod touch) it's actually possible to sync it with multiple computers. You just have to understand the rules. Apple groups things into four categories:

Data – the data or info category consists primarily of things like your contacts, calendar, bookmarks, notes, email accounts, etc. This information can either be sync'd via iTunes or wirelessly via MobileMe or Microsoft Exchange (although Notes currently can only be sync'd via iTunes). 

Media – the media category consists of your music, movies, music videos, TV shows, podcasts, audiobooks, ringtones, iTunesU and now iBooks. This content can either be sync'd or managed manually.

Photos – well this category is pretty self explanatory. It's your photo library and all of your photo albums. Your photos can either be in iPhoto or simply in a folders and subfolders.

Apps – last but certainly not least is your Apps that you've downloaded from the App Store.

Now that you know what the four categories are the content from these four categories can live on one, two, three or four different computers.

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Yes it is, no it isn't: a roundup on the iPhone 4 signal "issue"

At this point, there's no longer any question in our minds that the iPhone 4's antenna can be made to lose signal by holding it "wrong" -- and we definitely think it's more than a little silly that simply holding the phone in your left hand has been nicknamed the "death grip."

That said, however, it's not at all clear what the real-world effects of the antenna issue actually are for most people -- as we've repeatedly said, several iPhone 4s owned by the Engadget staff (including our review unit) have never experienced so much as a single dropped call, while others suffer from signal issues that results in lost calls and unresponsive data in a dramatic way. What's more, at this point Apple's sold well over two million iPhone 4s, and we simply haven't heard the sort of outcry from users that we'd normally hear if a product this high-profile and this popular had a showstopping defect. Honestly, it's puzzling -- we know that the phone has an antenna-related problem, but we're simply not able to say what that issue actually means for everyday users.

So we're doing what we can do: we've collected reports from every member of the Engadget staff who's using the phone, as well as reached out to a variety of tech industry colleagues for their experiences. As you'll see, most of our peers seem to be doing perfectly fine with their iPhone 4s...

Translation from Apple PR-Speak to English of the 'Letter regarding iPhone 4'

It really is a better antenna and gets better reception, overall, than any previous iPhone. That’s really the hell of this whole goddamn situation. It’s like a two steps forward, one step back design, except maybe more like three steps forward, because this thing is faster at downloading, 10 times faster at uploading, and most importantly is better at not dropping calls with a weak signal.

iPhone 4's multiband antenna makes it a true 'world phone'

iPhone 4 has a pentaband antenna/chipset (although the Apple specs page only lists four, the FCC lists five bands), meaning it works not only on the GSM frequencies the earlier iPhones did, but it also now supports 900 MHz UMTS/HSDPA. This increases the utility of the phone by a great deal for many international users, many of whom will now have access to extended 3G networks for the first time with iPhone 4.

The antenna in iPhone 4 also means it's now a true "world phone" -- with access to GSM 3G over different frequencies, iPhone 4 should be able to connect to virtually any GSM 3G network in the world now (with the notable exception of T-Mobile in the US).

It's also likely iPhone 4 will have much better wireless reception than earlier iPhones because of its construction. According to the keynote, the stainless steel side casing functions as part of iPhone 4's antenna.

A Verizon reality check

There would almost definitely be a Verizon Wireless logo somewhere on the iPhone’s case, probably on both the front and back. There may be separate Verizon music, video, and app store icons that you can’t delete. A built-in feature may be disabled at Verizon’s request because they want to sell you their own version for an additional monthly fee. Verizon may want a cut of any iTunes or App Store revenue from on-device purchases, the cost of which Apple would probably happily pass along to either users or developers. (My guess: Developers.)

This is Verizon we’re talking about. They might “save” us from some of AT&T’s problems, but they’ll bring their own.

It’s easy to think that the grass is always greener away from AT&T, but keep in mind that these are cellular carriers: massive oligopolists that don’t give a shit about us. Their phones are ARPU vending machines, first and foremost, not communication tools. Cellular carriers are only a small step above cable and phone companies in the contempt and disregard they show for their customers.