I’m not sure if this is one of the precautions set up by Google Adsense to prevent us from accidentally clicking (or tapping) our own ads. If so, it’s a good one.
However, I also want to see what ads are appearing on my websites when viewed using an Android phone. That’s why I borrow another Android phone to observe Adsense ads on my websites.
Maybe it’s the fact that I used the same email address on Adsense and on my Android phone or the custom Rom that I installed contains an app that blocks Adsense ads. But I have no problem viewing Adsense ads on other websites.
I also tried tethering my phone’s internet connection to my laptop and observed the same – no Adsense ads. Even my friend’s laptop connected to my phone’s WiFi hotspot didn’t show adsense ads on my websites.