lol its the same build quality as the IP4 an the issues that ur having is either due to ur carelessness or stupidity
and for the batterly life...its not that hard to fix
1. there is a drop down menu with 2 widgets running...turn them off
2. there is siri which has a proximity sensor ALWAYS turned on.....turn it off by going to Settings > General > Settings > Raise to speak to "off"
3. there are constant location services running with iADs.....turn them off by Settings > Location Services > System Services > Location Based iAds to "off"
4. apps that u open always remained paused upon exit, its part of the multi tasking feature...so close them by double clicking the home button, holding down one of the icons that appear and then closing them
the iPhone 4S also has 2 processors that take more juice, if u want more battery life get a phone that has less features....and dont tell me ur going to get a SII cause the battery life on the 4S sucks, the SII makes the iPhone battery seem like its eternal, Androids have **** battery