Much drivel being spouted here. If crew control needed to call you an hour before an early standy began to give you a heads up, then your standby duty should have been rostered to start earlier, but it didn't, so tough. You're either on standby or you're not and my phone will be off until my standby begins. I have once had them call me as soon as I switched it on to say 'we need you at the airport in 20 minutes, we've been trying to call you for the last 2 hours'. Well guess what, I wasn't on standby two hours ago, but I'll get there as soon as I can and within the one hour contracted standby report time.