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Why would the SAR level of the iPhone 3G be so much higher than that of the 3GS?
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Senior User
Join Date: Oct 1999
Location: Austin, TX 78751
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Cnet rates the 3G at 1.38, whereas the 3GS is rated at 0.79.
How can this be? I thought that the 3G and the 3GS have basically the same baseband!
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Administrator  Join Date: Apr 2001
Location: San Antonio TX USA
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Here's a link to their comparison chart.
Since there is a considerable difference in the hardware of the 3GS from the 3G, I think Apple has simply tightened up tolerances and the new design allows less leakage. A redesigned antenna, better shielding of internal components, and upgraded internal components could all work to reduce the SAR of any cell phone.
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Glenn -----OTR/L, MOT, Tx
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Senior User
Join Date: Oct 1999
Location: Austin, TX 78751
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Originally Posted by ghporter 
Here's a link to their comparison chart.
Since there is a considerable difference in the hardware of the 3GS from the 3G, I think Apple has simply tightened up tolerances and the new design allows less leakage. A redesigned antenna, better shielding of internal components, and upgraded internal components could all work to reduce the SAR of any cell phone.
Actually, I thought that only the CPU, graphics chip, and camera had changed.
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Administrator Join Date: Apr 2001
Location: San Antonio TX USA
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If they decided to change any of the hardware (that's a significant amount of change already) why not use newer versions of existing RF parts? And more shielding is always better. Besides, all they announced was changes to the CPU, graphics chip and camera-they could have done a lot more. In fact it looks like they did-comparing the "tear down" reviews of the 3G and 3GS, the internals look significantly different.
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Glenn -----OTR/L, MOT, Tx
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Clinically Insane
Join Date: Nov 1999
Location: 888500128, C3, 2nd soft.
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Originally Posted by Le Flaneur
Actually, I thought that only the CPU, graphics chip, and camera had changed.
AFAIK, power management has improved significantly, as well, which might help contribute considerably towards lower emissions.
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