A couple notable promotions were announced today, including: T-Mobile’s Zero Down offer as part of its Magenta Deal Days, and a trade-in offer worth up to $300 for those purchasing a new HTC phone.

HTC is providing those who purchase a new HTC phone with up to $300 for their old, functioning smartphone after the purchase. You will not be able to use the cash toward the cost of the new device up front. Droid Life reported HTC is offering around $290 for a 32GB Verizon Galaxy S3, however, while others are getting quotes in the $150 range for a Verizon Motorola Droid RAZR Maxx in working condition. You can get your quote from HTC here.

As for T-Mobile, it is offering $0 down from Sept. 21 to Sept. 30 on qualifying 4G smartphones for new customers. Some of the devices on offer include the Samsung Galaxy S III, HTC One S, T-Mobile myTouch Q, Samsung Galaxy S Relay 4G, and Samsung Galaxy Note.

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T-Mobile’s full press release below:

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T-Mobile Helps Customers Fall Into Savings 

From Sept. 21–30, get any device, including the Samsung Galaxy S® III, for $0.00 down 

BELLEVUE, Wash. — Sept. 18, 2012 — Prices are falling at T-Mobile® this September during the “Magenta Deal Days” Zero Down promotion, making staying in touch more affordable than ever. Starting Sept. 21, customers can purchase any device, including the Samsung Galaxy S® III, for $0.00 down payment on qualifying Unlimited ValueTM and Unlimited Nationwide 4G Data plans after mail-in rebate card.

“Our customers continue to appreciate our ‘Magenta Deal Days’ offerings because they showcase our commitment to giving all our customers the best 4G experiences,” said Andrew Sherrard, senior vice president of marketing, T-Mobile USA. “With back to school in full swing, we’re glad to offer another great deal to keep families in touch.”

The Samsung Galaxy S III is one of T-Mobile’s fastest 4G (HSPA+ 42 technology) smartphones. With an intuitive design, the Galaxy S III enables customers to effortlessly share photos, videos and more to a compatible TV or other Galaxy S III devices. Featuring a beautiful 4.8-inch HD Super AMOLED™ screen, the Galaxy S III packs a powerful entertainment experience, which allows customers to watch HD movies and TV shows, download apps, and securely browse the Web.

New customers will be eligible for this deal when they sign a two-year agreement on any qualifying Unlimited Value and Unlimited Nationwide 4G Data plan (Unlimited, 5GB or 10GB). Existing customers also can take advantage of this offer.1

Data-hungry smartphone customers can choose the ultimate worry-free experience with T-Mobile’s new Unlimited Nationwide 4G Data plan, featuring no data caps, no speed limits and no overages, as well as fast, dependable nationwide 4G coverage. For more details about T-Mobile’s Unlimited Nationwide 4G Data plan, visit http://www.T-Mobile.com/unlimited-data-plan.

The following is a sample of device pricing and EIP payments included in the “Magenta Deal Days” offer with a qualifying Unlimited Value plan:

Device (Unlimited Value Plan)

EIP Monthly Payment2

Retail Price

Out-of-Pocket Down Payment

Mail-In Rebate Card

Net Down Payment (After Rebate)

Samsung Galaxy S III

$20.00

$549.99

$149.99

$150.00

$0.00

HTC® One S™

$20.00

$449.99

$49.99

$50.00

$0.00

T-Mobile® myTouch® Q

$15.00

$349.99

$49.99

$50.00

$0.00

Samsung Galaxy S Relay 4G

$15.00

$349.99

$99.99

$100.00

$0.00

BlackBerry® Bold™ 9900

$20.00

$499.99

$99.99

$100.00

$0.00

Samsung Galaxy Note

$20.00

$499.99

$99.99

$100.00

$0.00

The “Magenta Deal Days” promotion will be available at participating T-Mobile retail stores nationwide. For more information about T-Mobile’s “Magenta Deal Days” promotion and details about qualifying plans and services, visit http://bit.ly/NldCS8.

1 Standard migration fees will apply for existing Classic customers who switch to a Value plan and have less than 18 months of contract tenure.

2 Equipment installment plans: On approved credit and 0 percent APR. Down payment and unfinanced portion required at purchase. Remaining balance paid in 20 monthly installments.

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