domain not reachable from Android devices

Hi,

I have seen similar cases in the past: it is probably due to some filtering (ip addresses, ports, dns names) implemented by the mobile operator of those mobile devices.

So, what I would suggest (if you can interact with one of those device owners) is to ask them to do 2 trials to reach your site with the failing device:

1. when on mobile network
2. when hooked to a wifi network where other devices (PCs, phones, etc.) can reach your site

So, you can confirm or not my initial hypothesis above. If correct, you will have to handle that with corresponding mobile telco.

Best,

Didier