Change 2FA delivery method?

[danielle1]

I would like that option as well: to log into MyBT and receiving the code by email.  As people have said, there's only the option to change the phone number.

I do not have a mobile phone, so the code comes to landline, which for me means entering my password, then jumping up to answer the phone, jotting down or memorizing the code and getting back to laptop to enter it.

[chrisjp]

I'm afraid BT is not alone in only allowing phone numbers to be used for sending 2FA codes. A lot of banks do exactly the same and I've seen the (I think spurious) justification that phone numbers are "more secure" than emails.
You do get the option of using a landline phone if you don't have, or don't want to use, a mobile phone but, as has been said, this entails listening to the code being read out to you, which a lot of people find less convenient than seeing it written down.