That's correct, after a new beneficiary has been added payments can be changed without having to go through the additional security of passwords via an sms message again.armycw4ret wrote:Once you set up your 3rd party account and get the initial OTP to establish the account you will get one more otp when you make your first transfer the the new account you set up. After that subsequent transfers are accomplished without a otp and sms to your phone. So if you are abroad set up all your accounts before you leave.
The mobile number you register with them should be one you can receive sms messages overseas (via roaming) if you think may need to add new beneficiaries when outside of Thailand.
With DTAC you can register your mobile number on their website and then check if you still have credit and what has been deducted for any sms messages.