Originally Posted by StLBluesFan
The expected software update is a COSMETIC change only that deals with the signal bar display. It will have zero affect on the dropped call issue.
First: SJ Sharks Fan...
What Apple has discussed
is a cosmetic change. But, I suspect that if "changing the bar display" was all the update did-- we would have already seen it.
There are 2 other potential issues relating to signal and call dropping:
1) the proximity sensor?
2) the handoff between 3G and 2G when the signal strength is low.
I haven't investigated the proximity sensor issue and have nothing to say.
On the 3G/2G handoff, several users have reported that the iP4 (compared to the 3G or 3GS) attempts to hold on to the 3G connection and drops the call before it handsoff to 2G. This only really occurs where the 3G signal is weak or marginal. Some have stated that turning 3G off on the iP4 resolves the issue.
That leads me to believe that there is an issue with the 3G/2G handoff related to dropped calls. This could be exacerbated in the eye of the user when the 3G signal is erroneously reported as being strong.
Unless the 2G or 3G radios are defective, I suspect that the:
-- detection of signal strength of both 3G and 2G
-- averaging of signal strengths (over time) to determine which radio to use
-- the actual handoff (up or down)
are all performed in software and/or radio drivers.
That, coupled with the fact that we've seen no software update to correct "bars" issue, makes me think that Apple is changing the software to reduce "dropped calls" as well as display the "bars" correctly.
My experience with Apple, over many years, tells me that they will "do things in software" that others do with hardware only. This gives Apple the ability to "tweak" the hardware instead of replacing it.