[Dtac] How to receive SMS where my sim might not work?

[hakama]

Dtac is working abroad where I am now. In a previous country it wasn't at all and I couldn't receive sms from my bank because of this.

 

There're 2 android apps, which one should I use to receive sms if I'm again in a country where dtac doesn't work? is it "dtac" or "dtac call"?

 

Will I have to active an app somehow via mobile internet of my dtac simcard for receiving sms?

 

 

[mtls2005]

DTAC Call, assumes you have WiFi. Requires registration. I think you'll need to receive an SMS to register for DTAC Call.

 

http://www.dtac.co.th/en/info/dtac-call.html

 

https://play.google.com/store/apps/details?id=th.co.dtac.wificalling