Ok, autumnride, i hope not to hear from you, :-D
my phone keeps reboot, i really hope the cause is the SIM, if not i will have to think that is some kind of short circuit due to a general bad construction quality.
From my point of view and from what i read i don't think is a software problem.. i'm still waiting portico on my phone but i do not have big hope it will fix the reboot problem.
i wanna say that i saw the reboot hapening 4-5 times, most of the time i notice it because i take it off from my pocket and the phone ask me the sim pin.. so if someone do not have the pin security on might not notice the reboot.
thx again