While I controlled Oakland FIR briefly today I was noticing a lot of people where requesting frequency change while inside my sector. My guess is that they thought they needed to be active while they were with me on my frequency. This is not the case.
When you’re with Center at Cruise you can leave your device. We will leave you alone and you do not need to change frequency. During climb and descent you need to be at your device, but at cruise you do not and we expect you not to be.
When you leave our sector you will either be handed off to the next controller or given a frequency change.