Apple unveiled their new iPhone 4S on October 4 at the Apple's "Let's
talk iPhone" event at Cupertino. Here's some of the information that
we need to know about the device iPhone 4s. Steve Jobs described the
phone as, "beyond a doubt, the most precise thing and one of the most
beautiful things we've ever made" before highlighting a number of its
new features. The device runs iOS 5 by default.
Bands (CDMA & GSM), Hardware, WiFi and battery life:
It is now a world phone, where you don't need separate device to use
CDMA or GSM. The new internal antenna system has been rethought and
now can access both GSM and CDMA signals. The antenna gate problem is
also sorted out. The iPhone 4S's hardware is now improved. It now
sports an A5 processor, the processor that runs on iPad 2 with an
amazing speed. The device also has a new GPU that enhances the gaming
experience. A demo of the Unreal Engine's Infinity Blade 2 was made
which showcased graphics in pair with a high-end computer gaming. The
new iPhone 4S sports an advanced WiFi antenna system. The phone can
now download at speeds of 14.4 mbps, which marks the highest in the
segment when it comes to WiFi download speeds from its competitors.
The iPhone 4S is now powered by a powerful battery, and is capable of
providing 8 hours of talk time on 3G, 14 hours of talk time on 2G, 300
hours of standby time, 6 hours of internet usage in 3G and 9 hours of
internet usage in WiFi.The iPhone is also capable of playing up to 10
hours of video and more than 40 hours of audio. This is incredible.
Camera and screen resolution:
The iPhone 4S's camera has been buffed up and the device now have an 8
mega pixel camera built into it. As usual, the device is capable of
shooting HD videos at 1080p.The camera's resolution uses the actual
pixels to shoot a photo. The picture resolution is 3264 x 2448, which
is really huge and the clarity is just amazing when seen on the phone
as well as on the computer. The phone uses a new Hybrid IR filter
which allows users to take brilliant shots even in low-light
situations. The phone also will have a improved screen resolution: 326
pixels per inch with heightened contrast. Jobs told that the 300
pixels per inch is the limit of the ability of the human retina to
view images. The camera application now comes with an in-built Face
Detection system that would recognize the faces of people
automatically.
iOS 5:
The iOS 5 is definitely one of the most stable and advanced mobile
operating system on the planet. With more than 200 feature
improvements from its previous version of iOS, the software is cool,
stable and is efficient in handling multi-tasking. iOS 5 is a
tremendous upgrade for the iPod touch, and so is iCloud.
Siri Assistant:
iOS 5 that comes with iPhone 4S is now equipped with Siri's voice
based assistant that would help you in getting information both from
your phone as well as from the internet with just your voice. The new
personal assistant has got a system-wide integration. The new feature
has been restricted only to the iPhone 4S. we can get a list of
examples of what we can do, including meetings, emails, directions,
weather, stocks, looking up contacts, creating notes.
How Siri Works?
Based on Applidium's reverse engineering, when you talk to your iPhone
4S' Siri, our voice is recorded and stored in a temporary location.
The audio is then compressed on the device with Speex, and is
transmitted to the servers for processing using a special and
encrypted HTTP request. After the servers process the speech, the
server sends back a zlib compressed package that contains the response
for your question. Every request that goes into the Apple's Servers is
SSL-encrypted and is highly secure. The technology uses a custom HTTP
request called ACE. This has a high Content-Length value and also a
special string that would let the server identify it as a assistant.
Adding to the amount of security work that Apple has done on Siri and
its servers, the packets also has a special header that sends the UDID
of the device. Not the regular UDID you see on iTunes. The servers
would process the request ONLY if it thinks that the UDID's are
correct and are valid and are coming from the actual iPhone 4S. But,
if this could be replicated, then it would be not so difficult to port
Siri onto other devices.
