Most of the initial reviews of Apple's iPhone
shared one complaint in common: AT&T's EDGE network was slow, and
it's the fastest cellular network the iPhone supported. In an interview with The Wall Street Journal, Steve Jobs explained Apple's rationale for not including 3G support in the initial iPhone:
"When we looked at 3G, the chipsets are not quite
mature, in the sense that they're not low-enough power for what we were
looking for. They were not integrated enough, so they took up too much
physical space. We cared a lot about battery life and we cared a lot
about physical size. Down the road, I'm sure some of those tradeoffs
will become more favorable towards 3G but as of now we think we made a
pretty good doggone decision."
The primary benefit of 3G support is obvious: faster data
rates. Using dslreports.com's mobile speed test, we were able to
pull an average of 100kbps off of AT&T's EDGE network as compared
to 1Mbps on its 3G UMTS/WCDMA network.
Apple's stance is that the iPhone gives you a slower than 3G
solution with EDGE, that doesn't consume a lot of power, and a faster
than 3G solution with Wi-Fi when you're in range of a network.
Our tests showed that on Wi-Fi, the iPhone was able to pull between 1
and 2Mbps, which is faster than what we got over UMTS but not
tremendously faster. While we appreciate the iPhone's Wi-Fi
support, the lightning quick iPhone interface makes those times that
you're on EDGE feel even slower than on other phones. Admittedly
it doesn't take too long to get used to, but we wanted to dig a little
deeper and see what really kept 3G out of the iPhone.
Pointing at size and power consumption, Steve gave us two targets to Mr. Jobs indicated that integration was a The largest chip on both motherboards contains the multimedia engine The iPhone would have to be a bit thicker, wider or longer to So the integration argument checks out, but what about the impact on
investigate. The space argument is an easy one to confirm, we
cracked open the Samsung Blackjack and looked at its 3G UMTS
implementation, powered by Qualcomm:
limitation to bringing UMTS to the iPhone, so we attempted to identify
all of the chips Apple used for its GSM/EDGE implementation (shown in
purple) vs. what Samsung had to use for its Blackjack (shown in red):
Motherboard Battle: iPhone (left) vs. Blackjack (right), only one layer of the iPhone's motherboard is present
which houses the modem itself, GSM/EDGE in the case of the iPhone's
motherboard (left) and GSM/EDGE/UMTS in the case of the Blackjack's
motherboard (right). The two smaller chips on the iPhone appear
to be the GSM transmitter/receiver and the GSM signal amplifier.
On the Blackjack, the chip in the lower left is a Qualcomm power
management chip that works in conjunction with the larger multimedia
engine we mentioned above. The two medium sized ICs in the middle
appear to be the UMTS/EDGE transmitter/receivers, while the remaining
chips are power amplifiers.
accommodate the same 3G UMTS interface that Samsung used in its
Blackjack. Instead, Apple went with Wi-Fi alongside GSM - the
square in green shows the Marvell 802.11b/g WLAN controller needed to
enable Wi-Fi.
battery life? In order to answer that question we looked at two
smartphones - the Samsung Blackjack and Apple's iPhone. The
Blackjack would be our 3G vs. EDGE testbed, while we'd look at the
impact of Wi-Fi on power consumption using the iPhone.
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Distributed by Hasan Shrek, independence blogger. Also run online business ,internet marketing solution , online store script .
Beside he is writing some others blogs for notebook computer , computer training , computer software and personal computer
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