Can Fiddler be used to throttle an Android's or iPhone's network connections

[Russell]

I test mobile applications on both Android and iOS. I've tried using Fiddler running on a desktop PC to monitor an Android phone's network connections.

Can Fiddler running on a desktop PC be used not only to monitor an Android's or iPhone's network connections, but to throttle (slow down the speed, in a controlled manner) the mobile device's network connections? If so, how?

 

Thank you.

- Russell Johnson
  Software Tester

[Eric R | Senior Technical Support Engineer]

Hi Russell,

Fiddler includes a Custom Rules Engine that can simulate throttling. To enable it go to Rules -> Customize Rules... or (CTRL + R) and set the m_SimulateModem variable to true. 

The script that executes when this is true is as follows:

if (m_SimulateModem) {
    // Delay sends by 300ms per KB uploaded.
    oSession["request-trickle-delay"] = "300"; 
    // Delay receives by 150ms per KB downloaded.
    oSession["response-trickle-delay"] = "150"; 
}

Note that the throttling may need to be tweaked to simulate mobile speeds instead.

Please let me know if you need any additional information. Thank you for using the Fiddler Forums.

Regards,

Eric R | Senior Technical Support Engineer
Progress Telerik