I am out of Thailand at the moment and I would like to extend validity of my pre paid Happy 3G sim. I only have 2 Months left. Ideally I would like to extend it 6 Months or more. In Thailand it is easy to do but how can I do it when I am out of the country? I can pay 100 baht with my bank online but that only gives me 30 days more.

Are there better options for extending sim validity (expiry date) whilst overseas? Checked other topics on this but many are old and had dead links as reference points. Thanks.

Assuming you can roam wherever you are:

http://www.dtac.co.th/en/prepaid/services/freeday.html

Otherwise contact DTAC and ask if they can help: [email protected]

Or just ask someone in Thailand to pop round a machine and add a few top-ups for you.

FYI I've found that the prepaid scratch cards work abroad too (this requires you to already have activated international roaming though?). The problem here is that the lowest denomination for DTAC scratch cards I've seen is 60 baht. So the free day option lomatopo pointed out above is more cost effective.

Thanks guys, I ended up filling out the feedback form online. It was actioned same day (Sunday) and they extended my validity by 6 Months for 12 baht. Very good service, thanks again.

I can extend every number in Thailand no matter where I am

Simple reacharge online, enter a network code or

Call hotlines also possible

Install Dtac App on Android Play Store, login then go to "Jaidee" then find Jaidee Day Giveaway. You can extend upto 180 days with just 15 baht fee.