Iphone 5 battery and 3g usage?

I have an iphone 5 and i'm having battery and 3g issues can you please tell me some ways and what i should turn off to save some battery and 3g usage thanks

Turn of the Wi-Fi and turn of the cellular data and your brightness should be 50-50, close the running application by double clicking the home button and long press on any1 app and delete all those apps coz those apps play a vital role in decreasing the battery.

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