trade-in program

We're just days away from the iPhone 4S launch, and if you've finally decided to take the plunge and upgrade from your year-old iPhone 4, don't worry — there are ways for you to trade up without having to sell your iPhone online. These outlets are trading iPhone 4s for cash, so start planning accordingly.

• Apple — Apple is offering up gift cards in exchange for iPhone 4s in working condition. Exchange values will vary depending on scratches, battery charges, and whether you've supplied the power cord.
• Nextworth — Get cash for your iPhone 4 through this company that accepts phones via mail and sends you payment via PayPal or check.
• Target — Target is also working alongside Nextworth to offer customers trade-in values at their mobile locations or online and payment in Target gift cards, which can be used to buy the new iPhone 4S in store.
• Radio Shack — The Shack offers in-store trading in exchange for cash value, or you can choose to complete the trade-in online, which will garner you a Radio Shack gift card, which you can use toward the purchase of a new iPhone 4S.

Have any other locations to add to the list? Tell us about them in the comments!

Continuing the cash-for-iPhone trend first introduced by Verizon and then Target, eBay has now launched its own phone trade-in program, starting today and continuing through Feb. 22. While eBay's program covers a number of recently announced smartphones, customers will get the most cash for trading in a gently used AT&T iPhone 4 — a guaranteed $200 to up to $450 based on its condition, which is more than enough to cover the cost of a new Verizon iPhone, and even rivals Verizon's own trade-in program. An iPhone 3GS in good condition can net the user $200, and an HTC EVO 4G could get you as much as $200.

To take advantage of this eBay Instant Sale program, visit ebay.com/iPhone.

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.

Have you picked up a shiny new phone recently? With Android growing in popularity and the iPhone on its fourth go-around, many people are ditching their old phones in favor of a new device. Now Verizon is introducing a new way to dispose of an unwanted phone in the form of a new trade-in program. Verizon accepts all devices regardless of model or carrier, except for those that are to be exchanged under Verizon's warranty or exchange programs.

Learn more about the new program after the break.