23 hours ago, Heng said:

the reason why folks recommend DTAC over AIS for keeping a number 'alive' is that DTAC allows you to purchase validity time.

So does AIS:-

 

https://www.ais.th/12call/en/validity-transfer.html

 

3 minutes ago, OJAS said:

So does AIS:-

 

https://www.ais.th/12call/en/validity-transfer.html

 

That still looks less convenient at 5, 10, 20 day 'caps' per transfer but good to know anyway.   

It depends on which type of contract you have just now

Pre paid

Or

Post paid

 

I had Dtac and now have AIS Post Paid

I have international roaming activated so I can receive the online banking SMS

 

As long as you use WIFI only you’ll be fine don’t use Data

 

For pre paid you could checked validity with *121*# I think ? it would give duration of plan and current amount

My Dtac number is topped up with 30 baht I think every month automatically. 

On 11/26/2021 at 4:15 PM, The Hammer2021 said:

Pay from your mobile app as and when required

or pay a lump sum in advance

or get a friend to pay every month at a 7/11

The other question that springs to mind is regarding the AIS app. In order to log in, the app sends you a OTP SMS to the number for you to log into the AIS app. Does this work in a foreign country?