How to improve your iPhone 3G battery life?

The improvement of your iPhone 3G battery life is simple. That is: 
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• Disable 3G data radio 
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• Firstly open the ‘Settings’ 
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• Then Click General 
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• Then Click Network 
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• Then Enable 3G and toggle ‘Off’ 
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It is also helpful to your iPhone’s Battery improvment. 
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Moreover avoid extreme heat and turn the brightness down. That menas
turnoff the ‘Auto Brightness’ settings. The other tip of improvement of
Battery is Turn off ou iPhone’s Bluetooth when you do not need it