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For internet, I have eSIM, no WiFi.

For calls/texts, I have SIM, which has no internet.

I want SIM to use WiFi calling using the internet eSIM provides.

I tried selecting networks manually to choose something that doesn't get signal, but this usually doesn't work because all options get signal.

How can I make this happen?

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  • This is quite unclear. You can't force eSIM to use WiFi. "You want the SIM to use to use the internet that eSIM provides." A SIM is an access token, not something that creates/destroys networks
    – Allan
    Sep 24, 2023 at 16:01

2 Answers 2

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I am under the assumption that the person who is asking this question is traveling internationally and is looking to avoid roaming charges by their home carrier. The method I am about to describe requires the iPhone user to be present in their home carrier's service area (do this before your trip). The instructions are:

Go to Settings, click on Cellular

Settings page

You need to turn on Wi-Fi calling. Hopefully, you get to a page similar to this:

Cellular settings.

Once you do, click on "Network Selection".

It brings you to this:

Network selection screen.

Uncheck "Automatic" and select your own carrier's name, like this:manual selection.

Once all these steps are done, and you add your eSIM with data and configure it properly to use data in your destination, you will be able to force the home carrier to " using cellular data". As long as you adhere to your home carrier's plan rules (especially when it comes to calling international numbers), you will only be charged the regular plan fee you have been paying while at home.

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  • That's what I have been doing. I choose a provider that has no signal to force the sim to use esim's internet. But sometimes I need to get a signal in regular way (so I choose automatic), then I can't switch back to a provider that has no signal in some countries because all of them get signal. I guess there's no solution to this? Mar 31 at 13:55
  • One last ditch effort would be to contact your carrier's customer service and request that they turn off roaming on your line, and you can also turn off data roaming on your line as well. Apr 1 at 0:26
  • Roaming off/on has no effect on the situation. Only "selecting a network that isn't available" works. I couldn't find any other methods Apr 1 at 12:55
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If Wi-Fi Calling over Cellular Data works in some cases, but you want it to work all the time, unfortunately you're probably out of luck.

The phone will always try to use the primary SIM directly if possible, so you'd have to trick the phone into having no connectivity to only one SIM. This isn't possible on the phone.

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  • The author's SIM does not support WiFi calling. Sep 23, 2023 at 4:46
  • They provide no indication of that in their post. Definitely could be the reason (which is why I mentioned that)
    – Ezekiel
    Sep 23, 2023 at 5:23
  • 1. Of course SIM supports wifi calling otherwise this post is illogical. 2. Like I said in my post eSIM's internet works with SIM's wifi calling, but only when I'm in rural areas. I want it to work in city too Sep 23, 2023 at 14:50
  • @user3722246 Updated my answer with the new clarifications
    – Ezekiel
    Sep 23, 2023 at 23:43

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