It completely stopped my "no SIM" error when it updated. Although maybe I am using it more than I had, or accidentally forgetting to close certain things before I sleep. The only difference for me has seemed to be battery related. I close everything in the "recent apps" and then clear the ram. And the WiFi I never leave on or my data and yet the battery can drain as much as 20% over night and before it seemed far less. Could be coincidental, but I am not sure what else I should "stop" or check before sleeping that might be able to alleviate some drainage.