Pls help me...my soft keys on s4 (tje back and the menu key) somtime works and sometimes doesn't work after boot up , restart or tirning on my device....second thing....my s4 doesn't boot ip properly..by properly I mean it takes longer time and it doesn't show the (samsumg galaxy s4 GT-i9505 text...the owners of s4 may now what I mean) pls help...anyone who had or has problems like me....