Update: I've noticed a huge lag in my phone and more so now since upgrading to Jellybean 4.1.2 I'm not sure if this is an issue with my phone itself Rogers (Samsung Galaxy S2 i727R LTE) or what but it really sucks. Battery life has improved though. I have tried cleaning out caches and running Advance care to clean out junk etc, nothing seems to help. Scrolling through home screens, the keyboard and even opening apps has become super laggy. I did a factory reset after the update and that didnt help either. Tried a few hard resets too. Not sure what else to do... any ideas would be greatly appreciated.