88raymond said:sorry. if you haven't done the JB with your current firmware and saved the shsh blob, prior to selecting 'reset all settings', i'm afraid you cannot get back to 4.3.3.
there are some discussions about JB with a 4.3.5, but i haven't looked in depth to these. maybe others can help you.
88raymond said:there's a cydia tweak named "erase contacts" that i use to take out all contacts info in one fell swoop. i can't help you with the calendar entries, though