As a followup to the previous post I made regarding this issue, some people remain convinced that this may very well be a software bug. Many people are claiming that this also happens on their iPhone 3GS. Were this a hardware problem, specifically related to the side-band antenna that the iPhone 4 has, then this should not have been possible. And here’s the thing: people are claiming that they’ve noticed this has been happening ever since they updated to iOS 4.
Like I outlined in my previous post, supposedly Apple changed their method of selecting cell towers, but perhaps this was not limited to the iPhone 4 model. Perhaps Apple pushed this new algorithm to iOS 4 in general, which would explain why people are suddenly seeing this problem in the iPhone 3GS as well.
Some people are noticing that they encounter this issue in certain places only, for example at home they do, but not at work, or vice versa. Some attribute this to the possibility that different towers are used in in each of those locations. Some have brought up the fact (?) that the iPhone uses two different frequencies: 850 and 1900 MHz. They think that perhaps one of the locations where there are no problems is using one frequency whereas the other location is using another different frequency.
More and more people are saying that they too are experiencing this issue but with mixed results. Some say it seems to have no effect on the actual reception or call quality, going as far as noting that these things are better in this model than the previous ones despite seeing less bars. This is what I personally have experienced. I held the iPhone 4 in such a way to remove all of the bars, and then initiated and maintained a normal quality 5-10 minute call. There are also mixed results as to whether a case/bumper works in alleviating the dropped bars.
The media has picked up on this issue and it has been reported on by the BBC, ABC, and many others. Many people have called Apple regarding this issue with varying results. Some are sent a free Bumper case, while others are sent a replacement iPhone 4 with overnight shipping in the hopes that it is just a defect in the unit. Apple is yet to provide an official comment on the issue, but it is believed that it will not happen today as today is the official launch date.
