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M

New Member

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6 Messages

Sun, Sep 26, 2021 5:55 PM

iPhone13Pro eSIM: Can I have another SIM for a 2nd number?

When I go to Japan, I insert Japan SIM. The consequence of this is I am no longer able to receive voice mail and SMS to my US number. Now, iPhone13Pro is eSIM and the SIM slot is vacant. When I go to Japan next time and get a Japan SIM, can both phone numbers be active? If not, how do I switch between the two?

Thank you for any help.

Accepted Solution

Official Solution

sandblaster

ACE - Expert

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58.9K Messages

1年前

Yes, both can be active. Go to Apple for instructions:

https://support.apple.com/en-us/HT209044

Accepted Solution

Official Solution

kevink

ACE - Scholar

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545 Messages

1年前

In this mode when roaming off and cellular data off the att number will act like is connected to WiFi. It will connect using the other numbers data plan or WiFi. For voice and sms. 

dwill05

ACE - Master

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6.7K Messages

1年前

The phone has to be unlocked for this to work.  If the phone is locked to AT&T, both the eSIM and the physical SIM slot will only work with AT&T SIMs.  Also, you’ll need an international plan for using your AT&T number while in Japan, otherwise you’ll get hit for expensive roaming charges.

New Member

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6 Messages

1年前

Thank you for your quick responses. This is great news!

While I am in Japan, I need to disable AT&T Celluar and just leave it as WiFi call only (I only need to know/check if someone left me a voice message and need to receive SMS to iMessage only when I am on WiFi), or I will get a high roaming charge. The Apple doc site didn't explain if this is possible. Do you know the answer to this?

kevink

ACE - Scholar

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545 Messages

1年前

I've seen people mention doing this.  You also apparently have to disable roaming for that ATT line.

sandblaster

ACE - Expert

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58.9K Messages

1年前

The only way I know of to disable cellular is airplane mode and if you do put the phone in airplane mode, that applies to both lines. I’m pretty sure there is no way to disable cellular on the ATT line only. What you want to do is disable cellular data on the ATT line. Since incoming texts are free, you’ll only get hit with roaming charges if you answer a call on the ATT line and you are not on WiFi calling.

New Member

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6 Messages

1年前

Oh OK. So, is there a way to specify which SIM to be used for the data? Basically, I can't let AT&T cellular data to be used while I am in Japan. It must use the Japan SIM for data all the time.

ATTHelp

Community Support

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196.3K Messages

1年前

Hi @, let's look into how your usage of data can be affected while traveling abroad. 

 

Use these International travel tips when managing data use while traveling outside of the country.

 

Hopefully this information helps, and thanks for reaching out to the Community.

 

Jeff, AT&T Community Specialist 

                                           

New Member

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6 Messages

1年前

Thank you for your response @ATTHelp but that document won't help. I need to use data with Japan SIM only and not using AT&T cellular data at all. I need to know if that is possible. If not, my only option seems to buy another phone to use with Japan SIM.

sandblaster

ACE - Expert

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58.9K Messages

1年前

So, is there a way to specify which SIM to be used for the data?

Yes. Both sims will use data if you let them. By not allowing the ATT sim to use data, you restrict data use to the Japanese sim. You want to turn automatic data switching off and turn data roaming off for the ATT sim. Read the Apple document again, I’m pretty sure it covered how to accomplish what you want.

ATTHelp

Community Support

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196.3K Messages

1年前

Thanks for your response @madflute.

 

This article will walk you through the process of setting up the second SIM and switching over to it. Your iPhone can only use one cellular data network at a time so, as long as you have the SIM that you wish to use selected, you should be good to go.

 

Please us know if you have any additional questions.

 

Darais, AT&T Community Specialist 

New Member

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6 Messages

1年前

Hi @ATTHelp , the link you gave me seems to be broken.

Hi @sandblaster , Thank you, I reread the article. It says "One number at a time can use cellular data. To change which number uses cellular data, follow these steps: " which is loud and clear. I should not enable "Allow Cellular Data Switching" in order to avoid the roaming charges.

Please allow me to recap what I am looking for. For voice mail, I only need to be notified when I am on WiFi. The more important issue is SMS.  I have iMassage receiving SMS to my AT&T number.

Years back, I used to rent a phone and a pocket wifi router in Japan. I set my AT&T iPhone to AirPlane mode and I was receiving SMS fine. Then I switched to Japan SIM. Because my iPhone's number changes in Japan, I was no longer able to receive SMS until I replace the Japan SIM with the AT&T SIM. This was the big issue. What I didn't expect was that as soon as you remove the AT&T SIM, I was no longer receiving SMS on my MacBook Pro and iPad since the Japan SIM number propagated to all of my devices.

Ah, I think I realized I should had asked if iMessage still can receive SMS to my AT&T number while I set the Japan SIM as primary and AT&T eSIM with roaming off and/or disabling "Allow Cellular Data Switching". This question may not be appropriate on this forum and may be I should had asked to Apple support?

Thank you so much for your time. You all are so kind. Appreciate it.

New Member

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6 Messages

1年前

Thank you @kevink , sounds like I am all set. On my next trip to Japan, I will order the Japan SIM with a confidence. I was almost buying another phone. Thank you!

ATTHelp

Community Support

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196.3K Messages

1年前

That's great to hear, @madflute!

 

Thank you for your participation in the AT&T Community/Forums.

 

We're here for assistance with AT&T products and services.

 

Lar, AT&T Community Specialist

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