Disable 3G on iPhone – Increase Battery Life

In India 3g is yet to be launched and so even if you bought iPhone3g you are forced to use it on GPRS. But, still if you kept 3G enabled in your iPhone it will drain out your batteries like anything. Apple claims that you will get 5 hours of talk time if you are using it with 3G enabled. So, once you switch 3G off, you can get  almost 10 hours of talk time.

Here is step by step procedure to get it done :

In Home screen, tap Settings and then tap General:

Tap on Network, and on top you will be able to see a slider for Enable 3G. Set if off and you are done.

Follow the same procedure to set 3G on.

Via : TheiPhoneBlog