Just picked up yesterday.
Reset several times.
Keyboard lags about every 4th or 5th press. Tried other keyboards to no avail.
Also fingerprint scanner will not let me initialize. Keep getting error telling me to restart phone.
Tech support answer was to exchange as my 14 days are not up.
Just wondering if anyone knows a fix to save hassle of having to drive to the store...again and again.
From your description you may have a "user interface microprocessor problem" that refers to the main processor chip not to you as the cause. I would return the phone for testing and possible replacement. Hope all works out!