I have a WP7702 on a MangoH Reb board that keeps restarting with no suspicious log messages on the console. With intervals from 20 minutes to hours it just restarts out of the blue.
I have just reflashed it with the latest official firmware but the behaviour is the same.
As can be seen from the console dump below, it just reboots straight out of the blue from the login: prompt with no user activity since the prevous reboot.
Starting Dropbear SSH server: dropbear. run_getty.sh: ttyHSL1 reserved for CONSOLE Poky (Yocto Project Reference Distro) 2.5.3 swi-mdm9x28-wp /dev/ttyHSL1 swi-mdm9x28-wp login: Android Bootloader - UART_DM Initialized!!!  Qseecom Init Done in Appsbl version is 0x405000  secure app region addr=0x87900000 size=0x280000 TZ App region notif returned with status:0 addr:87900000 size:2621440  TZ App log region register returned with status:0 addr:82681000 size:4096  Qseecom TZ Init Done in Appsbl  ERROR: No devinfo partition found ` `