ravip

Thank you for the clarifications. What confused me was that all these years, I used to check the balance once in a way by using the USSD code *121# and was never charged (when I was out of Thailand). I extended the validity of the SIM by transferring 20 ฿ from by Bangkok Bank app - each 20 ฿ extends the validity by 1 month up to a maximum of 12 months, which seems to be the maximum period possible.

Infact, when I am not in Thailand the AIS SIM is on another phone which is switched off most of the time. According to the reply I received from AIS, seems when you check the balance its charged as a SMS (roaming). The "Emergency airtime service" is a 'loan' of 20 ฿ when a prepaid account balance becomes 0 and it is recovered from the next top-up you do. Emergency airtime service can be cancelled by *602*1# So I guess, when not in use, keep the balance as low as possible and ONLY top-up to extend the life of the SIM. Dear xxx , After investigation, first top up 20 Baht minus 8.89 so the remaining is 11.10 Baht. Second top up 20 Baht +11.10 Baht =31.10 Baht.You have sent 1 SMS =22.47 Baht so the balance is 8.63 Baht now. Best Regards, zzz /AIS Contact Center

It seems AIS is charging for the OTP sms when you are overseas. Again, my account was deducted just now!

Well, I did get a response superfast, but not exactly sure what they are saying. I was in Thailand from the 1 July - 27 August 2023. Are incoming SMS charged (e.g. Bank OTP)? Never used outgoing IDD calls on roaming. Dear xxx, As we have checked, wewould like to confirm that the amount is correct, due to you have and advanced airtime on your phone 20 Baht. OIf you hit 0 Baht but you send some SMS or makeing call it would be deducted maximum 20 Baht as a minus amount. We seen you used some phone call/ SMS / SMS roaming on 04/08/2023 and 27/08/2023 so that the amount that you seen is the amount since 27/08/2023. But your mobile number valid until 05/08/2024 so do not worry about that. Best Regards, zzz/AIS Contact Centre

My apologies for necroposting, but I too have a similar issue. I left Thailand just over a month ago and my AIS prepaid SIM had a credit balance. But today when I checked it showed a debit balance of -8.89 ฿. On the My AIS app, I cannot see any recurrent active packages nor could I see for what the deductions were done for. Anyone has any idea how to cancel all (if any) recurrent data packages? (Already sent email to AIS and will post their reply with solution, if any) Thank you in advance.