It is true that the battery life is poor compared to other phones but that is because of all the great functions this phone has (mostly battery draining features...ie good quality camera, good resolution, games etc.), also the battery included with the phone is the "slim battery", Im pretty sure Samsung will release the "extended Battery" sometime soon....On average I get about 2-3 days off a full charge with moderate use (which is fine with me). One tip is to charge the phone with it powered off so you get a better charge...I also experience a lag on the phone, but I got that with my previous phones also (so no biggy). One other minor flaw is that when you take a picture with the phone closed it comes out reversed(mirrored), you can try it for yourself by taking a picture with words in the background, I also don't really care that much about this because I can just use any photo editor and reverse it myself, plus I don't take many pictures with the phone closed anyways...With all those flaws I still love this phone maybe Bluetooth would had made it better, but it has infared which is cool also....I suggest everyone and anyone to get this phone, IMO the best phone out right now (size,function, and style), all it needs is a firmware upgrade to fix the lag and the reversed camera problems and the "extended battery"