Unanswered8 months ago

How can I activate roaming on my True SIM while outside Thailand to receive SMS?

True SIM Roaming SMS reception Thailand International roaming Mobile plans

Waqar ********

asked Feb 26, 2026

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Hey guys.. How to activate roaming on my True SIM outside Thailand? I don't need package, just want to receive SMS.

Summary so far

Users reported that True and other Thai SIM providers have disabled the ability to receive SMS while abroad without an active roaming plan. While some mentioned using WiFi calling as an alternative, it may not always work for True SIMs. Generally, to receive texts, it seems a roaming plan needs to be activated, and users have had to add specific short-term packages to enable this feature.

13 repliesnewest first

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Deslea ********

You may find it just won’t work without an active roaming plan even if your regular plan seems like it should support it. I found that recently with AIS.

8 months ago

Raymond *****

Dtac app

go to setting then international roaming setting.. Turn it on.

8 months ago

Michael **********

I got a similar situation with my taiwanese sim card which forced me to buy a very expensive plan to get roaming abroad. I solved the problem using WiFi calling which means that your sim card will use the WiFi connection instead of the regular antenna connection. That will allow you to br anywhere in the world and still get calls and sms (if your phone supports that)

8 months ago

Fish **********

Did you install the app to access your mobile account on your phone ? I can do it for my AIS SIM card to activate roaming remotely from another country

8 months ago

Waqar ********

@Fish *********

yes I tried but couldn't find an option to activate roaming without subscription for data/ call package.

8 months ago

Fish **********

Not sure for True but this for AIS, under Network Setting

8 months ago

El***

I have dtac and I get texts calls still using WiFi calling. I think you have to go into a shop to get it enabled.

8 months ago

Waqar ********

El-Ee means nothing can be done from outside the country?

8 months ago

El***

@Waqar *******

I think it might tell you if you try to enable WiFi calling. Have you done that?

8 months ago

Mick ********

Unfortunately they disabled that a while ago. You used to be able to receive SMS messages outside the country without and international plan but now you need an active plan that allows roaming to receive SMS messages with true. I have tested this from Australia and nothing would come through until I added a 3 day roaming plan.

8 months ago

Waqar ********

@Mick *******

adding package is one time or you needed all the time?

8 months ago

Mick ********

Also as a few had sugested enabling WiFi calling I have just tried that and no luck with my True Sim

8 months ago

Mick ********

I think you need an active plan to receive text messages, when I added the 3 day plan it only worked for the three days then back to no service in Aus.

8 months ago