it'd their way to get you to come in and show receipt who your number is registered to. I had to do because they locked my app. Wen in and did the facial recognition
it's true. Beginning of the year most banks sent letter out that banks where ordered by the government to verify phone numbers to accts. And they can close o freeze acct. I had to go in regisistwe my new phone number for switching carriers. Its the law. Try reading bangkok post. It clearly told the situation