you should do so:
...} else {
$site_url = get_site_url()."/myloginpage/";
$has_success = true;
$message[] = "Successful registration";
global $wpdb;
$key = $wpdb->get_row($wpdb->prepare("SELECT ID,user_activation_key FROM $wpdb->users WHERE user_login = %s",$usermobile));
add_user_meta($key->ID,'usermobilenum',$usermobile);
wp_set_current_user( $newUserID, $usermobile );
wp_set_auth_cookie( $newUserID );
//do_action( 'wp_login', $usermobile );
$redirecturl = site_url('/?signup=true&login=too');
wp_redirect( $redirecturl );
exit;
}
}
}
}