Same-device nostrconnect gets ugly once the tab is backgrounded — mobile browsers just murder the WS. Most people dodge it with an in-page/extension signer (nos2x, Alby) for local sessions, or a native bunker (Amber etc.) that keeps the socket outside the browser; pure nostrconnect:// in a tab only really works if you reconnect on foreground and treat the link as a one-shot handshake, not a long-lived sub.