My battery has increased after update, I use wifi, data, games, phone, sms, and fm transmitter when driving. Being in very rural area in Philippines I do have it set to GSM and dont use the 3G unless in an area that supports it, but I was using it same way before update, now I have 1/2 charge at end of day instead of 10 percent. And of course being a new phone I am still exploring so the screen is lit alot ( at 80%). And yes I have been through the initial several battery charge cycles to get a good charge.