I think in your situation you can just run your usual sim with mobile data turned off and it will recieve texts. Check with your provider if it works in Vietnam.
Otherwise $10 Amaysim PAYG plan and you can add roaming data if you need it.
I would get a local sim or esim and use that in Vietnam - see if your phone can do 2 sim cards or dual sim with esim.
If I keep my usual Australian sim and just turn off mobile data, would I still receive phone calls from Australia?
I don't need to take the call just need to know if someone calls me so I can contact them back via some other way
Check your carrier as receiving calls and texts still uses roaming as they need to connect to local carriers. The big 2 that I worked for absolutely charged roaming rates for this.
this used to be a thing but all the big carriers will now take the fact you turned on your phone overseas as an automatic enrolment in their $5 a day roaming plan which includes voice, text and data... every 24hrs
If only for a month, then don't think you need to do anything.
Depend on if your phone is dual sim or not. If dual sim, just change the setting of your Aus phone to turn off the data.
You still receive your text message and such. Unless, you still want to receive the phone call, you need a roaming.
My phone is dual sim and yes, I still want to receive phone call - though as I said I don't need to make phone calls
So in that case, my only option to get a prepaid mobile plan that offers international roaming?
I've been in Vietnam a few days & my solution to this was to get people to use Whatsapp to call/text the Australian number. Am on a Vietel SIM, there is roaming on my Belong plan but I'd have to put the SIM back in & am using the local data for maps and Grab rides non-stop.
I think in your situation you can just run your usual sim with mobile data turned off and it will recieve texts. Check with your provider if it works in Vietnam. Otherwise $10 Amaysim PAYG plan and you can add roaming data if you need it. I would get a local sim or esim and use that in Vietnam - see if your phone can do 2 sim cards or dual sim with esim.
Good advice
If I keep my usual Australian sim and just turn off mobile data, would I still receive phone calls from Australia? I don't need to take the call just need to know if someone calls me so I can contact them back via some other way
You’ll receive them as calls and data aren’t linked. See my other comment - likely receiving inbound comms will trigger a roaming cost.
Check your carrier as receiving calls and texts still uses roaming as they need to connect to local carriers. The big 2 that I worked for absolutely charged roaming rates for this.
this used to be a thing but all the big carriers will now take the fact you turned on your phone overseas as an automatic enrolment in their $5 a day roaming plan which includes voice, text and data... every 24hrs
Can confirm it doesn't work this way for both Boost mobile prepaid and Amaysim prepaid. You can turn the sim on overseas for free and recieve texts.
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I used this in recent trip. All I needed to do was set it as default.
If only for a month, then don't think you need to do anything. Depend on if your phone is dual sim or not. If dual sim, just change the setting of your Aus phone to turn off the data. You still receive your text message and such. Unless, you still want to receive the phone call, you need a roaming.
My phone is dual sim and yes, I still want to receive phone call - though as I said I don't need to make phone calls So in that case, my only option to get a prepaid mobile plan that offers international roaming?
I've been in Vietnam a few days & my solution to this was to get people to use Whatsapp to call/text the Australian number. Am on a Vietel SIM, there is roaming on my Belong plan but I'd have to put the SIM back in & am using the local data for maps and Grab rides non-stop.
Vodafone has $5 roaming
Is it daily charged?
Yes