Hey Guys, same Prob here.. rebooting all the time, no chance to even save a new contact. i just switched it of and wait untill support responds on my mails.. hope it will be soon, because otherwise i have to revoke the contract..
btw: it happend already when no SIM was put in.
also did reset the wohle phone, still the same, so it was no app. i m a noob with technical stuff, thats all i could do.
at least i m glad that its not just me and bad carma