I haven't seen any phone with more lags or software flaws than this one.
To begin, the wakeup lag, sometimes more than 10 secs for the phone to wakeup.
The sd card read/write lag, I change my sd card to a Samsung top notch one, and the lag is still noticeable.
Memory issues, I recreates thisnissues in may ways, open up a game (plants vs zombies 2) play for a couple of mins, lock the phone, and see if you can weke it up.
I noticed a bit more smotthnes after the updatw but still the performance on this phone is just awful.
I hope this is an isolated issue, but I have seen a lot of people complaining about the lag as well.
Sent from my SM-G900T using XDA Premium HD app