sort of a noob with android. i've only had mine for about 3 months. a few days ago i upgraded my samsung captivate to 2.3.5 and now the battery life is super not good. i only get about 8 hours of battery life using the phone lightly-moderately. didn't keep track of battery life before but it was definately better than 8 hrs. did a factory reset but phone is still getting bad battery life. i've read a bunch of threads/blogs on how to increase battery life but no luck for me. i'm thinking about returning it to att.. would that be possible? i'd be glad with just a new battery from them if they aren't willing to replace the whole phone. only thing i'm concerned about when returning the phone, is that the phone was supposed to be for me sister because her 2yr contract was expired so we used her line to order the phone for me. i ordered it from the att website and on the receipt it shows her number. would that cause any issues if i went in like this. should i put her sim into the phone? she currently has an iphone 3g. and one more thing, do they care that i used kies to update from 2.2 to 2.3? thanks.