There’s a lot to unpack there. And, I don’t have access to ASWO so can’t check it.
But, if I were to hazard a guess, it’d be that the ISP/mobile provider was blocking it due to high data use or, they think it’s some kind of a problem. They might think it’s iffy for some security type issue.
I say that as if it works on other networks, like your home internet connection but just not on your mobile service, it’d strongly suggest the issue was with the mobile service and not the site (ASWO in this case) or the mobile device itself.
To get around it, you could use a VPN on the phone, but unless you’re okay with networking and such, that might not be an option.
Kl