I have the same problem. I changed my mobile number in 2022, and old number registered in my ASNB .
Before that the old apps I can still log in ASNb to do transactions.
Now after new updated apps, I cannot do transactions without verifying MYASNB secure.
I tried to enable the MYASNB secure but it sent the TAC to my old mobile number
Looks like I have to go to ASNB branch to update mobile number for TAC receiver?

This post has been edited by CSW1990: Jan 4 2024, 11:37 AM

Unable to change phone number at the website. In the end I went to ASNB branch to settle at the machine there