Apple Releases iOS 4.0.1 to Address iPhone 4 Antenna Issue and iPhone 4 Press Conference Tomorrow

Submitted by lalit on July 15, 2010 - 4:13pm.

Apple today issued iOS 4.0.1 update for iPhone 4 that improves the accuracy of the reported signal strength displayed on the phone. Apple’s release statement says that the update “improves the formula to determine how many bars of signal strength to display”.

So the updated only changes how the signal strength bars are displayed on the iPhone, but doesn’t address the drop in signal strength caused by holding the iPhone in left hand grip, which is related to the external antenna design of the iPhone.

After updating the iPhone 4 the first thing we noticed was that it was showing four bars in place of five signal bars it regularly showed in our area. Also holding the phone resulted in signal strength going to three or two bars, which previously use to go from five bars to one bar while using the phone in hand.

Anandtech has posted a chart showing the difference in signal strength representation in iOS 4 and iOS 4.0.1 on the iPhone. Basically, Apple has shortened the range of fifth bar (-51dB to -76dB), while increasing the range of other four bars. Specially, the first bar in iOS 4.0.1 which now ranges from -107dB to -121dB in place of -107dB to -113dB on iOS 4.

The update addresses only the signal strength representation on the iPhone 4 and not the problem caused by holding the iPhone in your hand. Apple is going to have a press conference tomorrow (Friday, July 16th) at 10 AM PST / 1 PM EST. According to Apple, the conference is related to the iPhone 4, but they didn’t provide any details. We hope that Apple will talk in detail about the iPhone 4 antenna issue tomorrow and hence we will be doing a live coverage of the conference on at 10 AM PST/ 1 PM EST. We will do live commentary as well as analysis of what Apple says during the conference. Join us tomorrow at