But I have a question. How about the standby time. Battery life is terribly important, as any smart phone owner knows, and we wanted to make sure Apple's promises weren't just that. Some people believe that the device's battery isn't living up to the expectations Apple set. Maybe users want to copy dvd to iphone and enjoy movies n the long journey. Or someone like to listen music and play games. If so, how is it going? Well, we all know that the iPhone 4S has a faster processor, better camera, and of course the popular new Siri feature. Quite what is causing this no one is quite sure. Apple says the iPhone 4S has better 3G talk time than its predecessor – but it appears to offer 100 fewer hours on standby.

According to official figures on Apple's site for the phone, it has a standby time of 200 hours. That's a long time. But it's much less than the 250 hours quoted for Apple's first effort at its own phone, the iPhone in 2007 – and it's far less than the 300 hours given for the iPhone 3GS and iPhone 4.

Other battery life figures quoted by Apple marketing chief Phil Schiller during his presentation at Cupertino included lots of data about the new phone, and its battery life: 8 hours of 3G talk time, 14 hours of 2G talk time, 6 hours of Wi-Fi 3G browsing, 9 hours of Wi-Fi browsing. Other battery life statistics for the iPhone 4S's battery life – 3G talk time, 2G talk time, 3G internet browsing, video playback – are the same or better, apart from the Wi-Fi browsing, which is given at nine hours for the 4S, and 10 for the iPhone 4.

For comparison, the Samsung Galaxy S II standby time is given as 710 hours on 2G and 610 hours on 3G standby. Samsung also gives talk time as 520min (8hr 40min) on 3G and 1100 minutes (18hr 20min) on 2G. While 200 hours is a long time (and 710 hours very much longer), the reality is that nobody gets the battery life promised in specifications like these. But they're often indicative – so you might expect that this will indicate a notably shorter battery life for the iPhone 4S.

Might it be the dual-processor A5 chip that's being used to power it? Or, alternatively, possibly it is the iOS 5 software, which was still under development when the phone would have been prepared. Apple had no response. .Well, I suppose there is no other choice now.

But if you're looking for a way to squeeze a little more juice out of your new iPhone 4's battery, you might try checking out some of these battery-saving tips. Apple also has a support page setup with some useful pointers. And if you have some questions about how to transfer music from ipod to iphone, here is the answer.

1. Turn the iPhone on if not already on.

2. Press the black sleep/wake button on the top of the phone, then slide the bar to unlock the phone.

3. Go to the Settings icon then to the Brightness tab. Slide the brightness slide bar a little less than halfway down. It should appear right under the letter 'h' in "Brightness". Then also turn the Auto-Brightness to 'ON'. Go back to settings.

4. Go to the 'General' tab, then check and see if the Bluetooth tab is on or off. If on and you are not currently using it with a Bluetooth device I recommend turning it off. It will save hours of battery life. Navigate back to the settings area.

5. Go to the 'Mail' tab in the settings area and under the 'Messages' Heading tap the 'Auto-Check' tab. You will have four different options. Depending on how much you rely on viewing you email and how often you need to view it is how you need to base this decision. If you need to view it often click the 15 min, less the 30. I recommend the manual option. It will save a lot of battery. Then go back to the 'Mail' area.

6. While still in the mail options area tap the 'Show' tab. You will have five options ranging from 25 messages to 200 recent messages. The fewer is the best option because it will take less time to load and save battery. Check the "25 Recent Messages" option. Navigate back to the 'Mail' then to Settings.

7. While still viewing your settings check to see if your Wi-Fi is 'On' or 'Off'. If not using your Wi-Fi currently tap the tab and turn it to the 'Off' position. Then you can navigate back to the settings area.

8. Press the home button. You are all done and ready to add at least an hour to your battery usage life. Possibly more. I can easily use my iPhone all day doing lots of tasks and calls.