# File lib/mobileesp_converted/user_agent_info.rb, line 534
    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