I had the same with kasikorn in April, went and got a new sim for easiness went to kasikorn branch updated all.... now 1st of July same things happened.
OK that's good so it's in the 72 hours running up to arrival then. That's not so bad. No doubt it will be a pain for the first while with teething issues!
going by the nature of his question, i assumed he has been to thailand in the past. Therefore it doesnt take a rocket scientist to understand what hes actually asking. Majority of people on here love to belittle people. The first answer given was no help to anyone.