RadioShack confirmed on Monday that the retailer will stock the AT&T and Sprint version of the Samsung Galaxy Note 3. Starting on Friday, October 4, customers will be able to purchase the device in stores and online at RadioShack.com. Buyers can take advantage of the Trade & Save program and earn $175 toward the purchase of the device with trade-in of the Galaxy Note 2. Wanna trade in the first model? You’ll score $100 for the original version of the smartphone/tablet hybrid.