Have kept my phone at the beta 10.3.3, not sure if I want to upgrade to the latest, which it is constantly asking me to do. About the last month I've noticed considerable battery drain. I don't keep things running in the background and blue tooth off. I went as far as to change out the battery yesterday, and am noticing little improvement. My question...should I allow the update to the phone, to see if there is improvement? I think it would go to 11.2.5. Please advise. I see resolving this issue with an update, is a crap shoot.