It would be great if AngelOne provides an option of TOTP for the 2FA. It is quick and works on any device where one has configured TOTP apps like Google/Microsoft Authenticator app.
I find option of TOTP more useful (on Zerodha) as I have installed the trading apps on my secondary mobile where I have no active mobile connection. I just use that phone for trading purpose having apps like AngelOne and Zerodha.
Hope it makes sense.