Please Help, about the kernel

[ctb01]

Hi guys~! Thank you for the wonderful works! To the DEVs!
I’m using my RHOD400 CDMA world phone, carrier is ChinaTelecom, with UIM card inserted(I knew that the original build is for “no CDMA UIM card” so far). I got hit by the auto-reboot problem.
So far I use kernel 1232(zImage-2.6.27.46-01232-gb7033df modules-2.6.27.46-01232-gb7033df.tar.gz) so well, I can make a call, got 3G connection, reboot loop nerver happen. When I replace with the kernel 01276, it cause auto-reboot after the first run——the home screen showed just around 5 secs, shortly after the phone got full signal, then reboot by itself.
I’d tried many times using different builds, include FRX05, but still the same. I found that when I turn off air-plane mode, let it connect to the carri, will make it auto-reboot.
Yesterday, I’d tried the kernel from 01232 to 01245, found that 1242 is OK, but from 1245 on（sorry for the mistake I'd made, not 1254）, auto-reboot happened. Wondering what is the different between them, I try to visit gitorious.org to read the souce code green and red, but since I’m not a DEV, I got no conclusion.
Also, I try logcat, but from the log file I can’t tell what is the key info. How can I log the kernel debug info? CMD “cat proc/kmsg” seems not log all the kernel messages.
Attachment is the logfile, Please help! Thank you.