Ajax call returning 0 as response in mobile

I am trying to call ajax in wordpress. It work fine in browser but in mobile device it return response 0 . Here is my wordpress & Jquery code. please suggest where i am doing wrong

The code in functions.php file

function get_nearest_destinations() 
{

    $data = array();
    check_ajax_referer( "getnearestdestinations" );
    $args = array(
           'post_type' => 'post',
           'post_status' => 'publish',
           'posts_per_page' => -1,
         );

        $the_query =  new WP_Query($args);   

        if($the_query->have_posts()){

            while ( $the_query->have_posts() ) :

                      $the_query->the_post();
                      $data[] = array('title'=>get_the_title());
                       endwhile;
                }

          echo  json_encode($data); exit();     

}

add_action( 'wp_ajax_getnearest', 'get_nearest_destinations' );

Below is js code in template file….

<?php $nonce = wp_create_nonce( 'getnearestdestinations' );  ?>

jQuery.ajax({
            type: "POST",
            url: "<?php echo bloginfo('url').'/wp-admin/admin-ajax.php'; ?>",
            data: { action: 'getnearest', _ajax_nonce: '<?php echo $nonce; ?>'},
            dataType: "json",
            success: function(html){ 
                alert(html)
            }
        }); //close jQuery.ajax(