Mostly permissions. Apps require user permission to connect to a new network for the first time. Traffic from a mobile access point could be difficult to tunnel through a VPN. Background Mode can be unreliable because the operating system prioritizes the battery over apps. Ideally such features would be developed at the OS level. However, we also didn't have the bandwidth to go far down the mobile rabbit hole, because there are plenty of low hanging fruits in OpenWRT. We are looking for mobile developers who know what's the right way forward.

Yes, please! Let's make a TollGate compatible client for mobile devices. We are aware of some of the challenges, but we want to help to make this happen.

TollGates already have a relay. used the relay for his demo last cohort

You can find us at this year's nostrhackday if you want to learn more about it. Perhaps Deutsche Telekom could benefit from adopting the protocol in future..

https://github.com/aantonop/wifiportal21