iPhone 4

iPhone 3G and 3GS users: if you're hoping to upgrade to an iPhone 4, this may be your moment. Only a few months after it started selling the iPhone, Target has announced a trade-in program offering customers up to $200 for their working iPhone 3G or 3GS.

To take advantage of the offer, visit a Target Mobile center with your working previous-generation iPhone. You'll need to re-sign a two-year contract with AT&T — no, Verizon is not an option. Customers will receive up to $100 for a working iPhone 3G 16GB and up to $200 for an iPhone 3GS 32GB, which will then be credited to the purchase of an iPhone 4; $199 for 16GB and $299 for 32GB.

You can trade in your phones starting this Sunday, Feb. 6 through Saturday, Feb. 12.

Whether you've already preordered your Verizon iPhone 4 or are anxiously waiting for next week, you may want to take heed from lessons learned from seasoned iPhone users and cover your new iPhone with a good case. While Case-Mate was hot off the line with its Verizon iPhone-compatible cases, Incase is taking a different approach — a case that will allow full access to all the buttons, ports, and switches for both Verizon and AT&T iPhone models.

The company's Slider Case ($35) has been redesigned to work universally with both versions, and it comes in a wide range of colors to boot — from chrome to monochrome to artist series. You can order yours online now, and take a look at some of my favorite colors and styles in the gallery!

Just ahead of tomorrow's Verizon iPhone launch, the company announced its pricing options for service plans. A basic voice plan including 450 minutes per month will cost $40; a voice and text plan (including unlimited text messages) will cost $60. The previously announced unlimited data plan will run customers $30 per month, and, as expected, there will be an optional $20 mobile hotspot supplement.

In contrast, AT&T no longer offers an unlimited data option but does have a $25 data option for up to 2GB of data per month. Potential Verizon iPhone customers, don't forget: the unlimited data option is only available for a limited time, so don't snooze on ordering your new phone! Here's everything you need to know.

Good news for Verizon customers who plan on upgrading to the iPhone 4 next month: you'll have a chance to do so before the rest of the Apple-hungry, AT&T-ditching masses. Verizon has confirmed that existing customers will get first crack at ordering, starting at 12 a.m. PST on Feb. 3. Trust me, you won't want to sleep in. In fact, you'll need to be ready for ordering online, have an open My Verizon account, and quick fingers — supplies are very limited, and orders will be taken on a first-come, first-served basis. Get your order in, and your brand new iPhone 4 will arrive via Fed Ex two-day air.

What happens if you miss the boat? Find out after the break.

If you thought Case Mate's Stack Case for the iPhone 4 was great, check out the Quartet Case ($35), a similarly designed case for your iPhone 4 that comes in mix-and-match, snap-together pieces. Like the Stack Case, the Quartet Case was also conceived by industrial designer Erik Arlen.

Each case comes with six pieces to create an evolving look for your phone, and four different color combinations are available. For now, this case is only available for the AT&T iPhone 4; stay tuned for a Verizon version.

I'm (of course) partial to the orange hues but love that purchasing more than one set will allow for even more creative color combinations.

Not surprisingly, Verizon is ramping up its new device trade-in program and sweetening the deal for AT&T customers at the same time. Not only are they passing out $200 debit cards for recently-new customers, allowing eligible customers to use their New Every Two credits, and launching the iPhone 4 with unlimited data packages, but it's also offering cash credits to lure customers over from AT&T.

Find out how much you can get for trading in your AT&T iPhones after the jump.

Verizon held off on announcing its data plan pricing for its new iPhone 4 during this month's press event, which brought up some cost concerns. However, the company has confirmed that it will be offering an unlimited data package for just $30 a month. With AT&T's recent restructuring of its data plans last year, this news may give Verizon a leg up by enticing new subscribers to head on over to its network and finally get its large population of feature phone users to upgrade to a full-fledged smartphone.

But be warned: the data buffet won't be open forever. Find out more after the break.