full report here:
https://code.google.com/p/android/issues/detail?id=28474&thanks=28474&ts=1333955192
Signal lost irrecoverably when Galaxy Nexus is in Standby/idle, and unable to re-connect data, phone signal bars jammed and misleading - Android 4.0.2 and 4.0.4
Reported by michaelt...@gmail.com, Today (3 minutes ago)
Phone: Samsung Galaxy Nexus
Version: GSM
OS: Android 4.0.4
Build: IMM76D
Baseband: I9250XXLA2
Kernel: 3.0.8-g034fec9
android-build@vpbs1 #1
SMP PREEMPT tue Mar 13 15:46:20 PDT 2012
(previous was a YAKJUXW phone from Singapore's SINGTEL)
When phone is left untouched overnight, data connected via WIFI, both WIFI and GSM indicators will show blue and everything seems normal.
When move out of WIFI range, the GSM strength bars will not change at all, like it's jammed. It will also not be able to form a G, 3G or H data connection at all.
When the phone is in this condition (ie. jammed signal bars, out of wifi range):
1) GSM Signal Monitoring test will show cell stations strength changing as per normal but cell strength bars on the Galaxy Nexus does not change at all.
2) Any telephone calling in to the Galaxy Nexus will get a `out of service' message.
3) SMS sent to this phone will not be received.
4) If you initiate a call with this phone, it will take more than 10 seconds to hear the first ringtone (usually 3-4 seconds). However, once you hear the first ringtone, the G sign will appear signifying resumption of data connection. Once this is done, the phone is properly reconnected and will receive voice, SMS and data properly.
5) If you put the phone to AIRPLANE MODE, then deactivate AIRPLANE MODE, GSM and data will reconnect properly, and everything will be fine.
Steps to reproduce the problem.
-------------------------------
Leave phone untouched overnight.
Notes:
a) Behaviour remained unchanged from 4.0.2 to 4.0.4 - all unrooted stock phones.
b) This issue differs from issue 28133 because issue 28133 does not happen to me at all.
c) This behaviour happens both when roaming and in the home network.