Apple iPhone 4S





The phone comes in six models: 16GB, 32GB and 64GB, in black or white. The 16GB model starts at $199 with contract ($649 without), and each additional storage option bumps the price up by $100.
The iPhone 4S looks almost exactly like an iPhone 4 ($99, 4.5 stars). The only way to tell them apart is in the fine print on the back. Sprint’s new phone is model A1349. It’s still a work of art, an improbable black (or white) glass slab with a metal band around it, cool and hard in the hand. Other phone-makers imitate, but none of them have pared their phones down to this pure industrial solidity.
Of course, with the 4′s body come some of its flaws. The glass front and back are prone to cracking if dropped frequently; I’ve seen more cracked iPhones than any other variety of device. And while Apple considers the 3.5-inch Retina Display perfect (and it’s gorgeous), I personally find the virtual keyboard too small to easily type on when it’s in portrait layout.
Apple has killed the “death grip,” at least on the Sprint model. The phone switches between its top and bottom antennas depending on which one is receiving better signal, which means it’ll ignore whichever one you’re covering with your hands. I was able to get data speeds to drop by gripping the phone from both ends in a bizarre two-handed clench, but really, nobody uses a phone that way.
Call quality on Sprint’s network through the phone’s earpiece was excellent in my tests. The earpiece goes loud, there’s a touch of side tone, and I didn’t hear any distortion at high volumes. Transmissions through the mic were sadly rather tinny, but they were perfectly loud and the mic blocked background noise very well. The speakerphone is fine for indoor use, but not loud enough to use outdoors; transmissions through the speakerphone were very clear. RF reception was on par with the Motorola Photon ($199, 4.5 stars) and other top Sprint phones.
The iPhone 4S paired easily with an Aliph Jawbone Era Bluetooth headset ($129, 4.5 stars), and I found that by pressing the button on the headset, I could issue an unusually wide range of voice commands (See “Siri” on the next page.) The Bluetooth headset also worked for music.


Sprint’s iPhone is a world phone which roams internationally for insanely high rates you can find atwww.sprint.com/international. There’s a SIM card in it which “existing customers in good standing” can request to be unlocked, so they can replace it with a less-expensive alternative overseas. Sprint’s phone will not work on Verizon’s or AT&T’s networks here, though.
The iPhone 4S got 7 hours, 33 minutes of 3G talk time. That’s considerably longer than the iPhone 4 for Verizon, which got 6 hours, 17 minutes, and it delivers on Apple’s promise of longer battery life – as long as you have strong wireless signal.
Internet and Web Browsing
The iPhone 4S is strictly a 3G phone. No 4G here. And I’m worried about the Sprint network’s ability to handle the strain. On launch day, all of my Sprint phones were crawling along at a pathetic 300-500kbps, with some data sessions taking several seconds to connect. Once I was connected, I was connected—I didn’t drop calls or data sessions—but it was like I was waiting in line to get on the Internet. Sprint, for its part, says it didn’t see any problems in New York City that day. And we’ve seen slow speeds on Sprint before. Our annual Fastest Mobile Networks tests rated Sprint’s 3G network as reliable, but slower than AT&T’s or Verizon’s.
But pour some data into this baby, and wow, it’ll go. As long as Adobe Flash isn’t a key part of your life, the iPhone 4S is the fastest Web phone ever. It benchmarks faster than any Android Gingerbread phone and faster than any Windows Phone. Side by side against the Motorola Photon on the same Wi-Fi network, the iPhone 4S consistently loaded pages a few seconds faster. The new version of Android, Ice Cream Sandwich, may even the score, but we haven’t seen or tested any ICS phones yet.
The great browsing speed comes in part from the new iOS 5, which we found made browsing much faster on all iPhones. It also comes in part from the new dual-core A5 processor, the same one used in the iPad 2. There aren’t a lot of third-party apps that take advantage of the dual-core processor and new GPU yet, but it’s key to some of the phone’s best experiences, such as the 1080p camera, AirPlay video streaming to Apple TV devices, and the browser.
And remember that on Sprint, unlike every other iPhone carrier, you get truly unlimited cellular data right now. That’s a good deal for heavy users, even if the data connection is slower than on other carriers.
There’s one exception to the unlimited data policy: tethering. While the phone supports tethering and hotspot mode, you need to pay $30 extra a month for them, and you only get 5GB of data to use on your laptop or other device.

Nokia Asha 303


  

Phone Nokia Asha 303 Manufacturer Nokia Status Coming Soon Available in India Yes Price (Indian Rupees) Expected Price:Rs.7925


Place : Chennai Delhi Kolkata Mumbai Price (USD) Expected Price: $176.11 approx
Description The Nokia Asha 303 is a Series 40 phone featuring support for quad-band EGSM, penta-band WCDMA, HSDPA, HSUPA and WLAN.




Highlights
- 2.6" Screen With Capacitive Touch
- WiFi
- FM
- 3.2MP Cam
Nokia Asha 303 Specifications
Collapse All Sections
Network
Technology / Frequency Bands         GSM : 850/900/1800/1900 MHz HSDPA : 900/2100 MHz   
            Battery
  • Type                            Li - Ion
  • Capacity                      1300 mAh      
  • Standby                       731 hours       
  • Talktime                      492 mins        


Built
  • Dimensions                 116.5x55.7x13.9 mm
  • Weight                         99 g    
  • Form Factor                bar      
                       Display
  • Size                             240 x 320 pixels         
  • Type    color :              TFT    
  • Colors                          262144 colors            
  • Secondary Display     no       
               Camera / Imaging / Video
  • Camera                       Yes 3.0 Megapixel
  •  
  • Resolution                   2048x1536 pixels       
  • Zoom                           yes     
  • Flash                           no       
  • Secondary Camera    no       
     Connectivity
  • Bluetooth                     Yes     
  • Irda                              No      
  • Wlan/Wi-fi                   Yes     
  • USB                            yes     
  • GPS                            no       
Data
  • GPRS                         Yes     
  • EDGE                         Yes     
  • 3G                               Yes     
  • Internet Browsing        Yes , WAP

Media
  • Audio Playback           Yes     
  • Video Playback           Yes     
  • Ringtones                    64 polyphonic MP3/MIDI/WAV/AMR
  • FM Radio                    Yes     
  • 3.5mm Headphone Jack        yes     
Memory
  • Inbuilt   100 MB
  • Memory Slot                      Yes microSD/TransFlash

Robotic Bug Gets Wings

Robotics

    But compared with its biological inspiration, the cockroach, DASH had certain limitations as to where it could scamper. Remaining stable while going over obstacles is fairly tricky for small robots, so the researchers affixed DASH with lateral and tail wings borrowed from a store-bought toy to see if that would help.

"Our overall goal is to give our robots the same all-terrain capabilities that other animals have," said Fearing. "In the real world, there will be situations where flying is a better option than crawling, and other places where flying won't work, such as in confined or crowded spaces. We needed a hybrid running-and-flying robot."

The researchers ran tests on four different configurations of the robotic roach, now called DASH+Wings. The test robots included one with a tail only and another that just had the wing's frames, to determine how the wings impacted locomotion.

With its motorized flapping wings, DASH+Wings' running speed nearly doubled, going from from 0.68 meters per second with legs alone to 1.29 meters per second. The robot could also take on steeper hills, going from an incline angle of 5.6 degrees to 16.9 degrees.

"With wings, we saw improvements in performance almost immediately," said study lead author Kevin Peterson, a Ph.D. student in Fearing's lab. "Not only did the wings make the robot faster and better at steeper inclines, it could now keep itself upright when descending. The wingless version of DASH could survive falls from eight stories tall, but it would sometimes land upside down, and where it landed was partly guided by luck."

The flapping wings improved the lift-drag ratio, helping DASH+Wings land on its feet instead of just plummeting uncontrolled. Once it hit the ground, the robot was able to continue on its way. Wind tunnel experiments showed that it is aerodynamically capable of gliding at an angle up to 24.7 degrees.

Tree-dwellers vs. ground-runners

The engineering team's work caught the attention of animal flight expert Robert Dudley, a UC Berkeley professor of integrative biology, who noted that the most dominant theories on flight evolution have been primarily derived from scant fossil records and theoretical modeling.

He referenced previous computer models suggesting that ground-dwellers, given the right conditions, would need only to triple their running speed in order to build up enough thrust for takeoff. The fact that DASH+Wings could maximally muster a doubling of its running speed suggests that wings do not provide enough of a boost to launch an animal from the ground. This finding is consistent with the theory that flight arose from animals that glided downwards from some height.

"The fossil evidence we do have suggests that the precursors to early birds had long feathers on all four limbs, and a long tail similarly endowed with a lot of feathers, which would mechanically be more beneficial for tree-dwelling gliders than for runners on the ground," said Dudley.

Dudley said that the winged version of DASH is not a perfect model for proto-birds -- it has six legs instead of two, and its wings use a sheet of plastic rather than feathers -- and thus cannot provide a slam-dunk answer to the question of how flight evolved.



"What the experiments did do was to demonstrate the feasibility of using robot models to test hypotheses of flight origins," he said. "It's the proof of concept that we can actually learn something useful about biological performance through systematic testing of a physical model."

Among other robotic insects being tested in the Biomimetic Millisystems Lab is a winged, bipedal robot called BOLT (Bipedal Ornithopter for Locomotion Transitioning) that more closely resembles the size and aerodynamics of precursors to flying birds and insects.

"It's still notable that adding wings to DASH resulted in marked improvements in its ability to get around," said Fearing. "It shows that flapping wings may provide some advantages evolutionarily, even if it doesn't enable flight."



The National Science Foundation's Center of Integrated Nanomechanical Systems and the U.S. Army Research Laboratory helped support this research.