I have an unlocked blackberry storm with a tmobile sim card in it and lately its been freezing up and doing all kinds of weird stuff so I was thinking bout doing a factory reset because that's what tmobile has always told me to do to my other phones (ie. Blackberry Curve, G1, Samsung Behold) so do you think it'll help my blackberry storm? And will my tmobile sim card still work after I do a manual reset?