android - App inventor/PHP app stopped working on Note 4's -

we have been using app clocks our engineers in/out connecting mysql database , submitting values it. 13th, app appears have stopped working on note 4's, still works fine on note 2's.

we wondering if firmware update has possibly stopped app working have been using app absolutely no issues until 13th , seems affecting have note 4's?

<?php $con=mysqli_connect("localhost","***********","**********","appacmef_app"); // check connection if (mysqli_connect_errno()) {   echo "failed connect mysql: " . mysqli_connect_error(); }  // escape variables security $employeeid = mysqli_real_escape_string($con, $_get['employeeid']); $time = mysqli_real_escape_string($con, $_get['time']); $longitude = mysqli_real_escape_string($con, $_get['longitude']); $lattitude = mysqli_real_escape_string($con, $_get['lattitude']); $vanreg = mysqli_real_escape_string($con, $_get['vanreg']);   $sql="insert clockings (employeeid, time, longitude, lattitude, vanreg) values ('$employeeid', '$time', '$longitude', '$lattitude', '$vanreg')";  if (!mysqli_query($con,$sql)) {   die('error: ' . mysqli_error($con)); }  mysqli_close($con); ?> 

any appreciated.

i have changed blocks , works again