I'm on Verizon, and a week ago I installed the April security update. All was well, it completed the update, but in Settings under "Software Update", it says it failed, with an error code of 401. I know it didn't fail, and that it installed, because "About Phone" shows the correct information with the security patch level as April 1, 2017. I've tried cache clearing and restarting the phone with no luck. I had never heard of this weird issue before, and googling brings up a handful of others who had it but no solutions. Also, since this update, my battery life has tanked. Standby time is still decent but any time I actually use the phone there's a steep dropoff, and my SOT has gone from 5.5-6 hours to less than 4. Anything I can do to fix all these issues short of factory resetting? I attached screenshots from the other day: