I found something interesting which seems has not been posted in this thread
Can someone have a look at their baseband crash report.
If everyone is having the same report, probably this is the culprit that Apple has to work at.
For Win7 it will be located at:
C:\Users\<username>\AppData\Roaming\Apple Computer\Logs\CrashReporter\MobileDevice\<phonename>\Baseband
for WinXP it will be located at:
c:\Documents and Settings\<username>\Application Data\Apple Computer\Logs\CrashReporter\MobileDevice\<phonename>\Baseband\
I had some logs
(this one must be running iOS5.0.1, BB 1.0.13)
Version=4
IncidentIdentifier=5BA8CED8-97E3-436C-93C7-206176745690
Date=2011-11-30;AP=9A405;BB=1.0.13;Model=N94AP;Machine=iPhone4,1
0:12:39 +1100 DST [rm] crash: state=Initialized
0:12:39 +1100 DST [rm] reset: reason=baseband crash;uptime=1071;count=2;
8:12:55 +1100 DST [rm] crash: state=Initialized
8:12:55 +1100 DST [rm] reset: reason=baseband crash;uptime=28820;count=3;
8:24:47 +1100 DST [rm] crash: state=Initialized
8:24:48 +1100 DST [rm] reset: reason=baseband crash;uptime=712;count=4;
8:27:20 +1100 DST [rm] crash: state=Powering Off
8:30:41 +1100 DST [rm] crash: state=Initialized
8:30:41 +1100 DST [rm] reset: reason=baseband crash;uptime=331;count=1;
8:34:45 +1100 DST [rm] crash: state=Initialized
8:34:45 +1100 DST [rm] reset: reason=baseband crash;uptime=244;count=2;
9:20:50 +1100 DST [rm] crash: state=Initialized
9:20:50 +1100 DST [rm] reset: reason=baseband crash;uptime=2771;count=3;
10:05:35 +1100 DST [rm] crash: state=Initialized
10:05:35 +1100 DST [rm] reset: reason=baseband crash;uptime=2695;count=4;
10:27:19 +1100 DST [rm] crash: state=Initialized
10:27:20 +1100 DST [rm] reset: reason=baseband crash;uptime=1310;count=5;
10:48:32 +1100 DST [rm] crash: state=Initialized
10:48:32 +1100 DST [rm] reset: reason=baseband crash;uptime=1276;count=6;
10:51:32 +1100 DST [rm] crash: state=Initialized
10:51:32 +1100 DST [rm] reset: reason=baseband crash;uptime=180;count=7;
12:28:49 +1100 DST [rm] crash: state=Initialized
12:28:49 +1100 DST [rm] reset: reason=baseband crash;uptime=5853;count=8;
13:22:14 +1100 DST [rm] crash: state=Initialized
13:22:14 +1100 DST [rm] reset: reason=baseband crash;uptime=3213;count=9;
15:06:10 +1100 DST [rm] reset: reason=call failed;uptime=6259;count=9;
15:50:27 +1100 DST [rm] reset: reason=call failed;uptime=8922;count=9;
15:50:37 +1100 DST [rm] reset: reason=call failed;uptime=8932;count=9;
17:16:50 +1100 DST [rm] crash: state=Initialized
17:16:50 +1100 DST [rm] reset: reason=baseband crash;uptime=14120;count=10;
17:38:08 +1100 DST [rm] crash: state=Initialized
17:38:08 +1100 DST [rm] reset: reason=baseband crash;uptime=1281;count=11;
18:46:37 +1100 DST [rm] crash: state=Initialized
18:46:37 +1100 DST [rm] reset: reason=baseband crash;uptime=4120;count=12;
18:49:12 +1100 DST [rm] crash: state=Initialized
18:49:12 +1100 DST [rm] reset: reason=baseband crash;uptime=155;count=13;
18:57:08 +1100 DST [rm] crash: state=Initialized
18:57:08 +1100 DST [rm] reset: reason=baseband crash;uptime=475;count=14;
Mine, running iOS 5.1, BB 2.0.10 (sorry, not much, due to phone heats up, so I stop the experiment)
Version=4
IncidentIdentifier=2264C086-A953-4168-B42F-0BAF5FF490C9
Date=2012-05-04;AP=9B179;BB=2.0.10;Model=N94AP;Machine=iPhone4,1
8:07:10 +1000 ST [rm] reset: reason=Modem Bootup failure;uptime=51;count=1;
9:43:44 +1000 ST [rm] crash: state=Powering Off
9:46:54 +1000 ST [rm] reset: reason=Modem Bootup failure;uptime=5848;count=1;
13:37:08 +1000 ST [rm] crash: state=Powering Off
15:26:30 +1000 ST [rm] crash: state=Powering Off
15:27:48 +1000 ST [rm] reset: reason=Modem Bootup failure;uptime=20457;count=1;
15:41:40 +1000 ST [rm] crash: state=Powering Off