**Editor's Note: Click here for our list of October's hottest selling smartphones to see how the iPhone fared against the competition, or here for our top 10 list of best smartphones in 2013 (so far).**
Discounts on new iPhones are rare, but wireless giants AT&T and Sprint are trying to get a leg up on Verizon, T-Mobile and other competitors for your holiday dollar.
AT&T and Sprint are both offering the 16 GB iPhone 5s for $100 to customers who sign up for a two-year contract online. Verizon is selling the same model online for $200.
Sprint also has reduced the price of the 32 GB iPhone 5s to $199 online with a two-year contract and the 64 GB iPhone to $299. The normal price is $299 and $399, respectively.
T-Mobile, like Verizon, is yet to reduce the price of the iPhone 5s. The Magenta Network, which did away with contracts and subsidies this year, sells it for about $650 (or $150 up front with 24 monthly installments of $20.83).
The sales should help the carriers retain more customers and encourage more to sign up for new contracts, but their profit margins will undoubtedly take a hit. We'll see if it's worth it in the long run.
T-Mobile added twice as many new subscribers as AT&T in the last quarter. Sprint has seen its subscriber numbers fall in recent quarters.