I must say I have never...never turned my 3G off. The 4G, off all the time. Here's my problem...I have a 4g phone that I have to turn the 4g off and even the 3G in order to get good batt life. To me, that is unacceptable. The verdict here is that batt technology has not caught up to phone tech. I did the screen brightness, always on, sbc kernel, etc and my 4g is horrid! Granted I have apps on that are checking constantly, but I am in a position in my life where I need informed I have an email, right away.
Also, I find it hard to compare an iPhone to these androids. My 3GS would go an entire day and into the next with the same level of use...no problem. Is 18+ hrs possible..totally, but to get that, I have to basically not use my phone the way I need to.
The fact that this was the biggest complaint with the 4g, htc should have used a 2500 battery...lol. There should be a no question difference...just my .02
Devices: Samsung Galaxy S3
Galaxy Note 10.1