A new tweak has been released in Cydia which will allow you to scroll your contacts to top automatically. The name of this tweak is Back To Top Contact. After you have installed this tweak on your jailbroken iPhone it will automatically scroll all of your contact lists up to the top when launching the Phone.app. You don’t need to tap on the status bar. If you have lots of contacts then this tweak will definitely help you. You should note that this tweak will not add any icon to the home screen of the iPhone. If you want to configure this tweak then you have to go to Settings panel.
Back To Top Contact tweak is available in Cydia under BigBoss repository for free of cost. You will need to have a jailbroken iPhone to install this tweak. If you don’t have jailbroken iPhone then you can follow the step by step instructions posted here to jailbreak your iPhone on iOS 4.2.1 with Redsn0w.