With HTC One availability stretching out across the nation yesterday, it’s the right time for HTC to offer a T-Mobile customer exclusive trade-in offer. From June 5th to June 9th HTC will offer you a guaranteed $100 trade-in and up to $300 when you buy the HTC One and trade in your old smartphone.

The terms are pretty simple, just buy the device between June 5th and June 9th and mail in your eligible smartphone with proof of purchase by June 30th. Example trade-in values are $300-$375 for the iPhone 5, $200-$255 for the iPhone 4S and $130-$210 for the Galaxy S III.

To start with this offer visit www.htctradeup.com/htcone/tmo and use promo code: TMO100. Follow the rest of the directions for mailing back your smartphone and get that trade-in value!