GSM versions upgrading to latest ICS experience problems.
With the extremely slow update of Ice Cream Sandwich, getting the latest and greatest version of Android 4.0 is something very few devices are able to get. An exception to that would be the Galaxy Nexus, which is a pure vanilla version of ICS directly from Google. It does not have manufacturer or wireless carrier updates (or should not have) contained on it and as a result, it arrives very soon after it has been announced. For Verizon, it does not happen that quickly because some of their add ons are on the Verizon Galaxy Nexus. With Android 4.0.4 release for GSM versions, reports are coming in where there is no wireless connection when the phone is in standby mode.
This problem impacts the ability to receive calls or other wireless activities, such as SMS, during the time the phone is in standby mode. This is being reported by Slash Gear where they are showing screen pictures. In those pictures it shows where the Galaxy Nexus does not have a wireless signal showing 42% of the time without a wireless signal. How many of you do not put your phone into standby mode? It just goes into that mode by itself and for GSM users, your connectivity goes to sleep doing the standby time. That renders the intended value of the Galaxy Nexus to very little more than a paper weight during the time it is sleeping.
Some are providing more details about exactly what is going on in this situation. Since the battery life drain issues are ones that are to be improved, it seems that reducing that drain has created part of the situation which is being reported here. As part of the desire to reduce the battery drain, it drops the processor performance below the threshold which is required to keep the GSM radio functional and able to receive wireless signals. If the processor shuts off various items to conserve power consumption, then the GSM signal is going to cease functioning and stop all wireless communications of any kind. Obviously, when the phone is brought out of standby mode, all features related to GSM connections are returned to normal.
While the Verizon Galaxy Nexus is not experiencing the problems, GSM owners are being impacted by this problem. Google has suggested that owners reporting these problems return back to Android 4.0.2 so that they no longer experience the problems which are being reported. Google is continuing to investigate the issue and as a result, we can expect another version of Ice Cream Sandwich to be rolled out to correct the problem very soon.