2 ms·

Where I live, most of the mass rapid transit stations are underground, and connection is sometimes spotty. The country has launched a secure public Wi-Fi servic

Where I live, most of the mass rapid transit stations are underground, and connection is sometimes spotty. The country has launched a secure public Wi-Fi service. Users on smartphones can authenticate using EAP-SIM[1], or laptop users can use an app developed by the agency to authenticate with WPA2 Enterprise PEAP MSCHAPv2. [1]: https://en.wikipedia.org/wiki/Extensible_Authentication_Protocol#EAP_Subscriber_Identity_Module_(EAP-SIM) https://en.wikipedia.org/wiki/Extensible_Authentication_Prot...

xobs 3y ago
The implementation here is rather annoying, because as soon as you enter the tunnel the wifi cuts off. But there's a 10-15 second latency where network connections just fail as the phone decides the AP is actually gone before it cuts over to LTE. Then the whole process repeats again once you get to the next station. Since LTE is usually reliable even in the tunnel, I usually remove the wifi connection. Granted it might help that I don't normally travel during peak hour, so the mobile network is usually fine for my needs. It's made even more annoying by the fact that "Forgetting" the connection only works until the phone is rebooted, at which point the behaviour returns.
- TheHappyOddish 3y ago
  > It's made even more annoying by the fact that "Forgetting" the connection only works until the phone is rebooted, at which point the behaviour returns. That seems odd. My phone doesn't connect to a network unless it's toggled to auto join, and certainly not post "forget". Can you not control this?
  - toast0 3y ago
    I'm not familiar with the networks in question, but I've run into a couple wifi networks connected to my lte carrier, and my unlocked phone pushes them hard. I imagine there's something coming from the SIM, and I could see the OS picking up SIM affiliated wifi networks on boot or sim insertion. Unless special care were taken, it makes sense that forgetting a network isn't remembered.
  - xobs 3y ago
    As far as I can tell, it's because the configuration comes from EAP-SIM (https://datatracker.ietf.org/doc/html/RFC4186 https://datatracker.ietf.org/doc/html/RFC4186) which gets refreshed on every reboot. This cannot be controlled - it will always regenerate when you restart the phone.

xobs 3y ago

The implementation here is rather annoying, because as soon as you enter the tunnel the wifi cuts off. But there's a 10-15 second latency where network connections just fail as the phone decides the AP is actually gone before it cuts over to LTE. Then the whole process repeats again once you get to the next station. Since LTE is usually reliable even in the tunnel, I usually remove the wifi connection. Granted it might help that I don't normally travel during peak hour, so the mobile network is usually fine for my needs. It's made even more annoying by the fact that "Forgetting" the connection only works until the phone is rebooted, at which point the behaviour returns.

TheHappyOddish 3y ago
> It's made even more annoying by the fact that "Forgetting" the connection only works until the phone is rebooted, at which point the behaviour returns. That seems odd. My phone doesn't connect to a network unless it's toggled to auto join, and certainly not post "forget". Can you not control this?
- toast0 3y ago
  I'm not familiar with the networks in question, but I've run into a couple wifi networks connected to my lte carrier, and my unlocked phone pushes them hard. I imagine there's something coming from the SIM, and I could see the OS picking up SIM affiliated wifi networks on boot or sim insertion. Unless special care were taken, it makes sense that forgetting a network isn't remembered.
- xobs 3y ago
  As far as I can tell, it's because the configuration comes from EAP-SIM (https://datatracker.ietf.org/doc/html/RFC4186 https://datatracker.ietf.org/doc/html/RFC4186) which gets refreshed on every reboot. This cannot be controlled - it will always regenerate when you restart the phone.