My bank didn’t require anything from True, they already had my current phone number and were only interested in my new passport.
Why would True want to change my sim yet retain the same number ?, i use an eSIM, seems like they are making work for themselves ?
But then again, i was surprised when the bank changed my bank book for the passport number change ?
But, i also found out that the bank uses a phone number for your account but you can have a different number linked to your bank card ! for a few years I was using the Lazada 1 year sims and changing the number at the ATM thinking it would change the number linked to my account also but no !
Something cropped up and i had to visit my bank branch to change the number linked to my account to my current number, strangely though they asked for no verification i only told them the number !!
Both the bank system and mobile operator seem to place confusing systems in place but neither increase security?