This is good phone but some times when I was types sms in my prime 4g phone that time not properly typing in my mobile means not every time key was pressed.so what can I do and I would like to one things about samsung mobile and entire company that is , sir I would like to you add one most important features in samsung every smart phone like when mobile charging is full then after automatically removed charger into mobile socket.so if u done this job then you will be made worlds no.1 company in world for making best mobile.I have faced this troubleshoots with my samsung galaxy grand prime. Performs slowly Freezes Turns off or unexpectedly restarts Displays error messages Is unable to install or update applications There is enough space in my phone memory but still it freezes and mobile get heated during operating.how to get rid of this problems?