def detect_symbian_o_s()
      if (user_agent.include?(DEVICE_SYMBIAN) || user_agent.include?(DEVICE_S60) || user_agent.include?(DEVICE_S70) || user_agent.include?(DEVICE_S80) || user_agent.include?(DEVICE_S90))
        return true
      end
      return false
    end
def detect_symbian_o_s()
      if (user_agent.include?(DEVICE_SYMBIAN) || user_agent.include?(DEVICE_S60) || user_agent.include?(DEVICE_S70) || user_agent.include?(DEVICE_S80) || user_agent.include?(DEVICE_S90))
        return true
      end
      return false
    end
=begin
*
     *
     * Detects if the current device is any Symbian OS-based device,
     *   including older S60, Series 70, Series 80, Series 90, and UIQ,
     *   or other browsers running on these devices.
     * @return detection of SymbianOS

=end