Hi @quanlm,
Unfortunately, there isn’t a way to conditionally allow the user to choose to verify by email or by phone.
If both email and phone verification are configured, the user must verify both to complete the sign-up flow.
One workaround that might work is to use different connections, one for verifying with email and the other for verifying by phone. Before redirecting the user to the login page, you can prompt the user to choose to verify with email or phone. From there, you can redirect to the login page and specify the connection query parameter of the connection they prefer.
I hope this helps.
Thanks,
Rueben