Sprint is offering two devices on discount through Saturday, March 10. The HTC Evo 3D and Samsung Nexus S are being sold in an online only sale for $50 and free, respectively, but only for a new line of service. No upgrades. This makes it harder to try out the phones before you buy them, but if you were thinking of grabbing the Evo 3D or Nexus S, this is a good time to do it. Compared to the other carriers, Sprint is the only one to still offer unlimited data plans. Of course, if you are planning to add one of these phones to your existing account that may not apply.

One downside is Sprint's network is not quite as fast as Verizon and AT&T, but neither of these phones are 4G capable anyway, so maybe that won't matter for most people. One big plus for Android enthusiasts is the Nexus S is the only phone so far to get the Android 4.0 update. Many other phones, including the Evo 3D are scheduled to get the update, but so far only the Nexus S has gotten it. Even the mighty Samsung Galaxy S2 hasn't gotten the official update yet. Nexus S is a 4-inch device with 16 gigabytes of storage, average battery life, dual cameras and a near field communications chip for use with the Google Wallet app and other wireless features.

For HTC fans, the Evo 3D is half-off with this deal, and Sprint will even throw in a free Otter Box protective case for your efforts. Evo 3D is a 4.3-inch phone with less storage than the Nexus S but with a bigger battery. Obviously, it shows 3D images without needing glasses, but it also includes a 3D camera on the back. There's a qHD display, bluetooth 3.0, HTC's Sense software and a dual-core processor. Really these are good deals for people who want to add another line to their existing plans, and if you have an unlimited data plan, then so much the better. For people who have a phone and their contract is up, depending on if you've ever had Sprint before might make the difference whether you choose to sign a new contract. If you're shopping around and have time to get to the store and try out these two phones before tomorrow night, this is one of the best deals around. Verizon also has a few phones on sale through March 12. The Droid line of phones are all $10 with a new two-year contract. Tell us in the comments which you think is the best deal.