After auto update to 4.4.2 my Samsung Galaxy Grand2 Duos sometimes reboots randomly in a space of time ranging from a few minutes to several hours. Also the screen has a tendency to scroll up by itself for no reasons whatsoever. With 4.3 I never experienced any such problems. I really hope...
On 4.3 just go to Samsung keyboard settings and select Reset settings at the bottom. Then select the actual settings you want. Worked for me on Galaxy Grand2
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