After several update over last year the phone started to be very slow. The final blow came beginning Dec 2019 when it did restart by itself and did install then 1 app. Usually will ask me for this. Since then the battery drains 10 times faster. So it is obvious that the update was meant to make me buy a new phone... But I like soo much the note 4.
First I did a factory resent. Did not help at all. Then I did flash it with Odin - now it works soooo fast, better than the new phones. But the battery drain continues. Fully charged in the evening I leave it in flight mode. In the morning the battery is only 50%. And this is with a new original Samsung battery I just bought. Will a re-flash with nand erase help? Does anyone have experience with this?