Testing a page using the iOS browser in Dulles, VA, I saw a system message preempt the page load.
See the screen shot of the results here:
http://www.webpagetest.org/screen_shot.p...1&cached=0
The text of the message is as follows:
Software Update
iOS 6.1.3 is now available for your phone.
Sorry, and thanks for the heads-up. I cleared the message from 2 of the 5 phones but it may pop up on the others. Even with a jailbreak and an update blocker they still get through - ahh, the fun of mobile testing.
Thanks for the quick resolution, Pat!
This is probably unrelated to the update notice but SPOF tests on iOS have 0 requests. The summary tab of the example URL above demonstrates this...
http://www.webpagetest.org/result/130320...9b55914d8/
I've reproduced the issue on a couple of different URLs before and after you cleared the message. I can fork this to a new thread if it's unrelated.
The iOS (and android) devices don't support scripts at all. They can only do basic URL testing right now.
If you want to test a mobile page for SPOF you best bet is to use a Chrome browser and go into the chrome advanced settings tab and turn on mobile device emulation.
Ahh gotcha. Thanks for the info.
Annnnnd cleared again. I think one of the phones still hasn't gotten it so I'll keep an eye out for it to show.