Haven't been in Th lately but due to the banking situation, I try to keep my phone service active with DTAC.  Normally I called 662 202 800, asked for eng speaking operator and they extended validity for a year with no problems.  This time they tell me to hold and never come back. Last night I set my phone aside, went for a walk and when I returned 50 mins later, the call was still on hold.   

 

Is there a better way to reach them by phone? Thanks a lot in advance.

If you switched International Roaming on before you left, you can extend by simply tapping a code into your phone... and hitting the Dial key afterwards.

*113*30*9# (30 day extension for 3 Baht)
*113*60*9# (60 day extension for 6 Baht)
*113*90*9# (90 day extension for 9 Baht)
*113*180*9# (180 day extension for 15 Baht)

 

Or do it via the DTAC web application: https://app.dtac.co.th/en/login

Yes, thank you. I switched to roaming but the card got corrupted in the meantime. Finally reached the right department at TRUE and they were able to extend validity.

 

FWIW: Old DTAC cs number +6622028000 does not work. The new TRUE number to call now is +6622028100.