Ok my iPhone is not activated but right after I updated I stopped using airplane mode cause I was using that for a while cause i thought it might help. But now that I am up to date like I took the SIM card out and when I wake up for school my phone is charged to 90 percent almost full the later when I check when I get home from school the battery life would be 40 percent and I did not use it at all it was only on sleep. And I decided to put the SIM card back in and it did the same thing now I'm going to try airplane mode, is it actually the update is this happening to others even though yours is even activated? Like not just iPhones all systems I'm guessing that it is. But I was wondering if this happened to others also?