I just installed 2.0....works fine...but then i went to cydia and it said there was 4 things that had to be updated....so I said ok.....it 95% through the 'running' of this and it is just stuck.....there is nothing I can do to power it off and reboot. I tried holding downt he power button but it will not even power off...how can I restart my iphone?? =) please . thanks