Hi.

I will be travelling soon to Vietnam and i bought a traveller sim card. My phone has 2 sim card. I was told by the seller to activate roaming for the traveller sim card when in Vietnam. If i activate roaming for my traveller sim, will it auto activate my maxis also? I know to activate roaming for Maxis, you hv to select to activate in the Maxis app.
And if i dont subscribe roaming for my maxis, can i receive call?
Thanks.

Not a maxis user here, but i travel a lot with traveler sim too. To answer your question:
1. If active roaming for traveler sim, it WILL NOT auto activate for maxis.
2. Roaming is only for data usage. As long as your line is still active and connected to the local telco there, you can still receive call and sms. However, it will be costly.

Remember, if you have dual sim, always activate roaming for traveler sim, then turn off roaming for main Maxis line. With this, you will not be charged for using mobile data over there.

I checked my phone it only has roaming in general for both sim. I cant activate roaming for sim 1 or sim 2. Am using S24 ultra.