For the past week, been having some problems with my iPhone.
Every time I either ring out or take a call the screen goes blank. Have to hold down the power button to restore screen access which is rather annoying.
Still got 1.1.4 because I jailbroke it last year. If I update, will this sort it? Will I be able to jailbrake it again if I update it to version 2.1 or whatever the current version is?