Hi guys it looks like I need your help again, i heard people saying that if you Turn wifi down to 10mW the battery should last longer, the problem is I really cant find where I could do that, could any one post step by step how to do that please.

And i got another question some people been saying after you use wi-fi there is a bug which is going to drain your batter if you doing restart your phone is this true? and also if it is do you have to restart it, or could go to offline mode then back to the normal mode ?

Thanks