Here is all just the lesser specifications, if you wanna know the detail for each product then you can visit the source by clicking the thread i've provided on the reviews. Even click on it if you mean to buy the product.
Let's take one product for our example here, Samsung Nexus S Unlocked Phone - U.S Warranty, as mentioned by the source. This Unlocked Nexus S is running at 3G network and adopts Android 2.3 Gingerbread with 1 GHz Hummingbird processor. It has a thin-profile contour display which makes the phone looks so unique slim, high-contrast screen, and is packed with the latest technologies including a Super AMOLED Contour Display with curved glass screen, 1 GHz Hummingbird processor, and Wireless-N Wi-Fi networking plus 3G Mobile Hotspot capability for sharing your 3G connection with up to six Wi-Fi enabled devices simultaneously.
Let's make it simple for read.
*Has the ability to read information from "smart" tags or everyday objects that have NFC chips in them.
*5Mp main camera + Second camera for easy video chats.
*GPS (A-GPS) for navigation and location-based services.
*Bluetooth for hands-free devices and stereo music streaming.
*Haptic feedback vibration.
*Capable to perform access to both personal and corporate e-mail.
*Up to 6 hours of talk time.
*Intelligent call routing and advanced features like call screening, blocking, and recording, plus You also get transcribed voicemail that's sent to you via email and/or text message, low-priced international calling, custom voicemail greeting capabilities, and more.
*Android 2.3 platform (dubbed "Gingerbread") which supports Adobe Flash Player 10.1 for accessing the full Web.
*Multitasking in Gingerbread.
*One-touch access to the popular Google mobile services like Google Search, Gmail, Google Maps with Navigation, Google Calendar, Picasa, and YouTube.
*Easy access to both personal and corporate e- mail, calendars, and contacts supported by Exchange Server and Gmail.
*4.6 ounces weight with 4.87 x 2.48 x 0.44 inches.
*A 1500 mAh lithium-ion battery rated up to 6 hours talk time.
*Ultra-fast 3G (peak download speeds of more than 10 Mbps, peak upload speeds of 1 Mbps, and average download speeds of 3-6 Mbps).
*Wireless-N Wi-Fi networking (802.11b/g/n).
*Built-in mobile hotspot.
*Bluetooth 2.1 A2DP.
*Full messaging capabilities including SMS text, MMS picture/video and IM instant messaging Personal and corporate e-mail.
*1 GHz Samsung Hummingbird processor.
*4-inch Super AMOLED Plus display reproduces sharper and brighter colors with improved visibility in bright light (480 x 800 pixels; 235 ppi).
*Sensors: three-axis gyroscope, accelerometer, digital compass, proximity and light sensors.
*5Mp main camera with auto-focus lens and flash.
*Front-facing VGA camera for easy video chats (640 x 480 px).
*DVD-quality video capture (720 x 480 px). Record in MPEG4, H.264, or H.263 formats.
*Multimedia Music player that compatible with MP3, WMA, and AAC/AAC+.
*Video player that compatible with MPEG4, H.264, H.263.
*16 GB internal memory (non-expandable).
*3.5mm headphone jack.
*Organizer tools including calculator, world clock, stopwatch, countdown timer, and memo.
*Hearing Aid Compatibility.
1. Samsung Nexus S Unlocked Phone--U.S. Warranty (Black)
Manufacturer: Samsung ||| Manufacturer reference: I9020A ||| Product Dimensions: 4.9 x 0.4 x 2.5 inches; 4.6 ounces ||| Shipping Weight: 14.4 ounces ||| Frequency: GSM Quad-band: 850 / 900 / 1800 / 1900 MHz - UMTS Tri-band: 850 / 1900 / 2100 MHz ||| Gingerbread pre-installed ||| Brilliant 4" contour display ||| Latest Google Mobile apps ||| 1 GHz processor ||| 16 GB internal memory ||| Wi-Fi 802.11 b/g/n ||| Connectivity: works on 2G for only GSM carriers and 3G for AT&T and any carriers that use the same bands ||| About Us$387.99 ||| Here to buy: Samsung Nexus S Unlocked
2. Samsung I9250 Galaxy Nexus 16GB (Unlocked)
Manufacturer: Samsung ||| Manufacturer reference: GT-I9250TSADBT ||| Product Dimensions: 4.7 x 4.7 x 1.8 inches; 15.5 ounces ||| Shipping Weight: 2 pounds ||| Slim and curved ||| Contour Display sits perfectly in your hand Stunning 4.6 inch ||| SUPER AMOLED ||| 1.2 GHz dual core processor ||| 16GB storage space ||| About Us$519.99 ||| Here to buy: Samsung I9250 Galaxy Nexus 16GB (Unlocked)
3. Samsung GT-i9250 Galaxy Nexus Unlocked Smartphone with Android OS 4.0, 16 GB Memory, Touchscreen, 5 MP Camera, Wi- Fi, and Dual-Core Processor - No Warranty (Black)
Manufacturer: Samsung ||| Manufacturer reference: I9250 ||| Product Dimensions: 5.3 x 0.5 x 2.7 inches; 5.6 ounces ||| Shipping Weight: 13.44 ounces ||| Network: GSM 850 / 900 / 1800 / 1900 - HSDPA 850 / 900 / 1700 / 1900 / 2100 ||| Platform: Ice Cream Sandwich (Android 4.0) Os ||| 1.2 GHZ dual core processor ||| 16GB built-in memory ||| 1GB RAM ||| Screen: 4.65" HD (1280 x 720) Super AMOLED ||| Contour Display (curved glass) ||| 5Mp continuous auto focus main camera ||| 1.3Mp second camera ||| LED Flash ||| Video recording in 1080p@30fps ||| Wi-Fi 802.11 a/b/g/n ||| dual-band ||| DLNA ||| Wi-Fi hotspot ||| Bluetooth v3.0 with A2DP ||| GPS with A-GPS support ||| Software keys (BUTTONLESS) ||| NFC support ||| ACCELEROMETER ||| GYRO ||| COMPASS ||| PROXIMITY/LIGHT ||| BAROMETER ||| Video out with Micro-USB ||| 1850mAh battery with Standby time Up to 290 hours (2G) / Up to 270 hours (3G) ||| Talk Time: Up to 17 h 40 min (2G) / Up to 8 h 20 min (3G) ||| Items in purchase: Samsung Galaxy Nexus GT-i9250 Black, Standard battery, AC travel charger/USB data cable, Stereo headset ||| About Us$519.99 ||| Here to buy: Samsung GT-i9250 Galaxy Nexus Unlocked Smartphone with Android OS 4.0, 16 GB Memory, Touchscreen, 5 MP Camera, Wi- Fi, and Dual-Core Processor - No Warranty (Black)
4. Samsung GSM I9250 Galaxy Nexus Unlocked Android Smart Phone
Manufacturer: Samsung ||| Manufacturer reference: GT-I9250 ||| Compatible with AT&T, T-Mobile, and other networks ||| Super AMOLED 720p HD ||| 5MP low-light optimized rear camera with flash Android 4.0 Ice Cream Sandwich Os ||| 1.3MP front camera ||| About Us$515.00 ||| Here to buy: Samsung GSM I9250 Galaxy Nexus Unlocked Android Smart Phone
5. Samsung Galaxy Nexus SA-I9250 Unlocked Phone - International Version (Titanium Silver)
Manufacturer: Samsung Item ||| model number: SA-I9250 ||| Product Dimensions: 5.3 x 2.7 x 0.4 inches; 4.6 ounces ||| Shipping Weight: 15.2 ounces ||| 16GB storage ||| 5MP camera 1080p HD video shooting ||| Wi-Fi ||| About Us$519.95 ||| Here to buy: Samsung Galaxy Nexus SA-I9250 Unlocked Phone - International Version (Titanium Silver)
6. Samsung Galaxy Nexus SA-I9250 Unlocked Cellphone - International Warranty (White)
Manufacturer: Samsung ||| model number: SA-I9250 ||| Product Dimensions: 5.3 x 2.7 x 0.4 inches; 4.6 ounces ||| Shipping Weight: 10.4 ounces ||| 16GB storage ||| 5MP camera 1080p HD video shooting ||| Wi-Fi ||| About Us$549.99 ||| Here to buy: Samsung Galaxy Nexus SA-I9250 Unlocked Cellphone - International Warranty (White)