As Greg said, your APN isn't going to have the slightest effect on your battery. The truth is, neither is anything else you can do. Some of you guys are really overly obsessing about battery life. The fact is, on ALL android devices, it sucks. That's because these phones have such big displays and power house processors. You'll get about 3 to 5 hours of screen time and nothing you can do will change that. You might extend your standby time, by not using the phone, but what fun would that be? The only way to fix it would be to make smaller slower phones, then no one would buy them. Just use the phone, enjoy the hell out of it, and plug it in when needed. If plugging in is not a easy option, consider getting one of those $40 battery packs.