[iLoveOncall]

> On mobile VPN isn't always effective in avoid geoblocks. Some apps are able to determine I'm in the UK and still ask for ID - reddit is one for example, if you stumble on to an adult subreddit.

I've never had this issue (using Private Internet Access on iOS).

[bjackman]

I'm a Brit living abroad, when I visit the UK I use a Tailscale network with an exit node at my home, and yeah this always seems to work for me.

Going the other way around to try and watch British TV I used to find with a normal hosted VPN services could still figure out I wasn't in the country, but now I have a Tailscale exit node at my mum's place in the UK it always works fine.

So I suspect it all comes down to the IP source, probably a residential IP is the best possible case and with commercial VPNs it depends on how hard they work on isolating their IP blocks from known datacentres.

[prima-facie]

Commercial VPNs publish their exit nodes IPs online. There are services like ipinfo.io which can accurately determine if you are using a known VPN service.