TD Authenticate does not require a network connection. I outright disabled network access for the app on my phone. Don't know how he got logged out but he almo

TD Authenticate does not require a network connection. I outright disabled network access for the app on my phone. Don't know how he got logged out but he almost certainly didn't check before leaving the country. Having said that, the 2FA for TD is atrocious as it provides SMS fallback in addition to their bespoke app.