Optimization on every start up here as well. Everything else is smooth. Weird..I'm not going to factory reset tho so I guess I'll see if it works out itself.
Att unlocked version.
Att unlocked version.
Made no difference for me.Try encrypting then factory reset.
Was not charging the 30+ times I have had the app optimizing routine at startup.Make sure u start the phone when it is not charging. That did it for me
This may be an important piece of info... I had kinda noticed but don't have clear memory for whether it was consistent BUT this seems to only happen to me if my phone is plugged in when it is trying to boot. Unfortunately this is a typical situation if my phone happens to run fully out of battery and power off. Of course could also be that the cache gets corrupted when the phone runs dry BUT similar observation the Optimizing process failed on me a couple times this past week leading to starting over from scratch... when I unplugged the phone it actually succeeded the process so being plugged in seems to be an issue.Try to plug the cable off before turning on the phone. Looks like a serious bug but that helped in my case.