Hello! I've finally tested this out. Android. Two different devices. One with a VPN, one without. Fails on all counts to call. Good: 1. Amber login works. 2. Layout is clean. Mediocre: 1. No dark mode out of the box. 2. Not pulling most recent profile info. Bad: 1. Contacts are not saved. 2. Calls don't reach the recipient. Looking at a firewall, I see a bunch of relay connections initiated, but nothing happens at the other end. 3. Calls hang with no timeout, I think. Basically, if you initiate a call and nothing happens, then try to call another npub, I get an error message about a call in progress or something like that. Please let me know what else I can do to help test.