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Wannabe Geek

  #3075911 13-May-2023 21:08
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From my experience in Australia with an iPhone XR running iOS 16, I used SIM 1 with Kogan NZ and SIM 2 with Optus AU.


I set cellular data to SIM 2.


When connected to WiFi, SIM 1 used WiFi calling and the carrier name changed to WiFi Calling.


When disconnected from WiFi, SIM 1's call and text used SIM 2's cellular data and the carrier name of SIM 1 changed to Using Mobile Data. 


Neither option triggered roaming fees, and I was able to make/receive calls and texts to NZ/AU for free, just as if I were in NZ.


If I turned off SIM 2's cellular data or removed SIM 2, and disconnected from WiFi, SIM 1 would roam on the local network.


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Uber Geek

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  #3075931 13-May-2023 22:54
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Kogan requires you to purchase a roaming addon and isn't subject to the $8/day roaming.
Wifi calling (whether over Wifi or Mobile data) also isn't treated as roaming. 




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Master Geek


  #3075934 14-May-2023 01:02
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No, In my understanding WIFI calling doesn't trigger roaming, only if you use another cell network O/seas to use data or send txt or make calls 



As quoted above. If you attach to a network and your roaming unless you have turned off mobile data before you leave the country the second your phone attaches to an overseas network you can almost be sure your charged $8 this is because the phone sets up a data session to sycn things like email and what ever apps are on the device.. If you where to put your phone into flight mode and still have wifi calling active and then turn it off as you where leaving the country then once you land overseas and turn your phone on all it could attach to is wifi. As the $8 daily roaming charge is in relation to attaching to a overseas mobile network, you wont be charged, as your phone is only attaching to wifi. So you can make calls receive calls at no cost. 

Anything I suggest or say is my own thoughts and not provided by anyone else unless stated

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