A Detailed Analysis of Apple\'s New Signal Bars

A Detailed Analysis of Apple\'s New Signal Bars

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Apple has updated the iPhone with new signal bars that provide a more accurate representation of signal strength.

AnandTech has posted a detailed look at these new bars and how they differ from the old ones.

Apple has dramatically changed the signal strength to signal bar mapping in iOS 4.0.1 and the iOS 4.1 beta, making the dynamic range not only much broader, but the range values for each bar much wider. The range of signals that correspond to bars three and four are the same width, and bar two is only slightly less. The cutoff value for two bars to one bar remains the same, but every other value has increased. The result is that the worst case drop of 24 dBm no longer makes all the signal bars disappear, but rather two.

Taking a look at the charts below you will see that previously the absolute lowest value any iPhone would report was -113 dBm. With iOS 4.0.1/4.1, the value is now a shockingly low -121 dBm.

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A Detailed Analysis of Apple\'s New Signal Bars

A Detailed Analysis of Apple\'s New Signal Bars

A Detailed Analysis of Apple\'s New Signal Bars

A Detailed Analysis of Apple\'s New Signal Bars

me - July 16, 2010 at 12:00pm
not that this solves any reception problems, but the bar-signal strength response is now about the same level as my original iPhone... so Apple saying that the problem with the programming of the bar-signal strength response went as far back as the original iPhone as completely BS!!! f\'n liars!!!
Name - July 15, 2010 at 7:14pm
According to this last chart, when the iPhone just drops to 3 bars, an Android phone will be showing 5 bars? Hmmmmmm......
pastaboy - July 15, 2010 at 7:03pm
This is so wrong, almost all GSM networks will not allow a call below -110 dBm and showing bars below that value is a farce. If these readings are correct per anandtech then this iphone software is making a fool of consumers.
Jay - July 15, 2010 at 6:33pm
Oh...I forgot. If it drops, they tell you to put a rubber on it. How clever. Steve, put a rubber on it, we don\'t want more idiots in this world.
KnightHawk - July 15, 2010 at 7:15pm
Here you go! The dumb ass is back!! Speaking about rubber this time...
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