[quote=ameri,Feb 8 2015, 08:17 PM]
i guess that's rare
this usually happens to me also but only for a short time.
while at it, your phone connected to the internet right?
i've read somewhere that it needs to connect to the internet as it is doing automatic routine backup.
[/quote]
That's why. Normally it happen for short time only.
quote=rogrog,Feb 8 2015, 11:59 PM]
Try to reinstall it.

[/quote]
The thing is, cant be install from Store. No any mean to click Install or Share.
Anyway, it solved already. Thanks for your guys feedback.