The answer to this is no. Cursor said so and I tried everything I and Cursor could think of and nothing worked.

[quote='869086022, DTS Engineer, /thread/808917?answerId=869086022#869086022'] Create a small test app that uses [/quote] Are you open to me inviting you to a private Github repo?

I’m not sure why you think cellular is a factor here. It is not. Peer-to-peer Wi-Fi is independent of cellular. I think this because things work (ie multiple devices are able to discover and connect to each other when no wifi network is available) only for devices without cellular. If i load the exact same app onto devices with cellular and try the same thing they are not able to discovery and connect to each other.

[quote='869086022, DTS Engineer, /thread/808917?answerId=869086022#869086022'] Create a small test app [/quote] I created four branches on my app: ios18_network_api_tcp ios18_network_api_quic ios26_network_api_tcp ios26_network_api_quic I have three physical devices to test with: iPad (Device A - iOS 26 - no cellular) iPhone (Device B - iOS 26 - no cellular) iPhone (Device C - iOS 26 - yes cellular) For each branch listed above I tested two scenarios: home Wi-Fi network ON home Wi-Fi network OFF (I physically turned off the router) Note that on each device the Wi-Fi toggle is ON. Results from each branch for home Wi-Fi ON: Devices A, B and C can all discovery and connect to each other Results from each branch for home Wi-Fi OFF: Devices A and B can discovery and connect to each other Device C is not able to discovery or connect to the other devices

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] Admittedly, that was all prior to iOS 26, so it’s possible we broke something. I’m gonna try to reproduce this here in my office, but I won’t have time to do that until after the winter break. [/quote] Thank you for taking the time to investigate this. I look forward to hearing back about what you find. Would me checking in on Jan 5th be appropriate?

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] If possible could you use TLS 1.3 and a PKCS#12 identity?

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] Hello @DTS Engineer - I wanted to touch base regarding this topic. I hope your holiday / break was pleasant and relaxing.

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] @DTS Engineer bumping to not lose visibility

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] @DTS Engineer bumping to not lose eyes

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] @DTS Engineer bump to not be forgotten

[quote='869237022, DTS Engineer, /thread/808917?answerId=869237022#869237022'] reproduce this here in my office [/quote] @DTS Engineer bump

hello @DTS Engineer I am bumping this thread to not lose visibility. If anyone in the DTS Engineering group can help me understand my issue it would be greatly appreciated. Regards, Captadoh

Hello I am curious what happened for this thread to receive no more input from Apple? Regards, Captadoh

[quote='874902022, DTS Engineer, /thread/808917?answerId=874902022#874902022'] I’ve been super busy. [/quote] Hello @DTS Engineer I wanted to check in regarding this issue. I checked the issue you mentioned that was taking a lot of your time and it looks to have slowed down.

[quote='877982022, DTS Engineer, /thread/808917?answerId=877982022#877982022'] my desire use the new Network framework API ‘correctly’. [/quote] Am I using the new Network Framework API incorrectly? Could me passing a closure that throws to NetworkListener.run(_:) be the cause of my issues? If yes then it is odd that things work as expected when devices do not have cellular service.