mine the same. Opened it 20 + years ago. I had never been asked to update anything either. However on a recent branch interaction the lady did mention to have my phone verified just as a precaution. No drama, went to dtac and got a print out with my name and passport number on it.
It avoids you having to pay a 250 baht atm fee + any extras your home bank charges you. I do cardless withdrawals and transfers within Thailand and there are zero fees.
They are not going to close you down for buying a new phone. I just walked into the bank and said, this is my new phone, can you help me set it up? And they did, didn't asked me anything else.
can you expand on this please? My first 65k went in on July 4th and my second one went in on August 8th. To do it properly, what date must be showing on my last transfer next year?