20151201 experiment update :
it became buttery smooth until today. stutters and lag came back.
I just tried to do the same by signing out of iCloud without keeping any data in the phone then signed in again, as I did on 20151129.
as the final trial before concluding anything for my stutter and lag case...
20151203 update:
(this is for my particular case only)
- using habit unchanged with iPhone 6 and 6S. I still have iPhone 6 with me.
- super smooth for only about 2 days again
- stutters getting frequent randomly, including say during app closing, folder opening and closing [lag (delayed response) and frames dropping]
just wondering if this is hardware or software problems?
- I hv even changed for another 6S from apple shop already
- this is iPhone's first 3D Touch phone and first 2Gb ram phone. high ram should make multi app usage even smoother theoretically, but it is the contrary in my case.
- of course I understand that I am using 9.2 "beta", but the situation was similar when I was using official 9.1 in my 6S.