Prompted by an email earlier today I've produced a very simple web page that carries out a very simple test that checks whether one of the modifications to web pages has been carried out when the page is loaded.
If you access the page Inlining Test on your mobile device whilst connected through your mobile network (not through WiFi), you should see one of two messages:
- "No identified modification has happened to this page"; or
- "This page has been altered! It appears that the stylesheet on this page has been inlined by your network provider."
It would be really helpful to get some feedback on which providers, mobile devices and APNs are exhibiting issues and in which parts of the world. If you could leave a comment if you have a problem on a setup that hasn't already been listed then that would be great.
Please note that this test hasn't been extensively tested so I can't guarantee it will work on every mobile browser. Feel free to let me know if you spot a gaff!