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The Samsung Galaxy Z Flip4
K

New Member

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9 Messages

Wed, Dec 1, 2021 7:21 AM

Transferring a sim card from one phone to another removes the ability to use mobile data

Is this supposed to happen? I was just testing out a phone and wanted to try using mobile data on it, but when I tried to use mobile data it didn't work. Then when I transferred the sim back to its original phone I wasn't able to use data at all. Wifi was fine, it was just the mobile data that disappeared. 

*Reposting in a different category since I'm not sure where this is supposed to be. 

Accepted Solution

Official Solution

ACE - Sage

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100.2K Messages

10 m مضت

Call at&t and correct the IMEI. 

ACE - Sage

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100.2K Messages

10 m مضت

Transferring a SIM card into a compatible phone would not disable mobile data. I suspect you are transferring your sim card into a phone that is not allowed on AT&T and will not work when 3-g sits down next February.

What is the make and model of the phone  you tested?

What make and model is your original phone? 

ATTHelp

Community Support

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200.3K Messages

10 m مضت

Hello @krappa, we'd be glad to help with getting your device back connected on the AT&T network. 

 

As @formerlyknownas stated, when transferring a sim card into another device you'll need to make sure the device is not locked from AT&T network and is compatible.

 

Once inserting your SIM card into a non-compatible device, all cellular data connections will be disabled due to the network detecting a device ineligible for use. At this time, you'll need to replace your SIM card for your device as the old one is no longer good.

 

Also, we're phasing out our 3G network in February 2022 to make room for an even better one that will improve your experience. Feel free to review and check if your device is still available for use on our network

 

We hope this information helps and let us know if you have any other questions or concerns. Thanks for reaching out to the AT&T Community!

 

Lynn, AT&T Community Specialist

New Member

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9 Messages

10 m مضت

@formerlyknownas The original (the phone the sim is normally in) is an unlocked Oneplus 7, bought from Amazon. So not a proprietary AT&T phone. 

The phone I tested is a Samsung S6 Edge, but I'm not sure if it's unlocked as I bought it from a friend years ago. 

New Member

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9 Messages

10 m مضت

@ATTHelp Is replacing the SIM the only option? Would I not be able to just call AT&T and have them resume the service? 

(edited)

ATTHelp

Community Support

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200.3K Messages

10 m مضت

Hello @,

 

Thank you for reaching back out to us.

 

If either of the cell phones that you're using are non-AT&T branded devices, you may need to program your data settings accordingly to connect to AT&T data services.

 

You can follow the steps at this link to program a non-AT&T Android device with the correct data settings.

 

Hope this helps!

 

Sean, AT&T Community Specialist

New Member

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9 Messages

10 m مضت

@ATTHelp That site is perfect, thank you. I will update if it works. 

New Member

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9 Messages

10 m مضت

@ATTHelp

Unfortunately it did not work. The settings are correct though right?

(edited)

ATTHelp

Community Support

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200.3K Messages

10 m مضت

Hello @,

 

Thanks for giving that a try.

 

Because that hasn't resolved the issue, we would recommend that you replace your SIM card and contact the previous owner of your device to verify if it has been unlocked or not.

 

Hope this helps!

 

Sean, AT&T Community Specialist

New Member

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9 Messages

10 m مضت

@ATTHelp On your previous owner comment, there is none. I am the original owner of the Oneplus device. It was the Samsung that I had bought from my friend (unfortunately I have no way of contacting him anymore). 

Does this information change anything or would I still need to replace the SIM card?

New Member

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9 Messages

10 m مضت

@formerlyknownas Oh the Oneplus is definitely compatible, as that has been my daily driver since I switched to AT&T a few months ago. I don't see the Samsung though so I guess that's the culprit. 

So because the Samsung isn't compatible, it basically "bricked" my SIM so I can no longer use it or is the SIM still salvageable? I'm really hoping to resolve this without having to go through the hassle of replacing it.

ATTHelp

Community Support

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200.3K Messages

10 m مضت

Thanks for your response, @krappa.

 

The solution to your concerns will be to replace the SIM card for your OnePlus as you have the option of picking one up in store or we can place an order for one to be mailed. 

 

It's correct that since the Samsung isn't compatible, it indeed "bricked" your sim card and it's not longer eligible for use.

 

Feel free to let us know if you have any further questions or concerns!

 

Lynn, AT&T Community Specialist

New Member

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9 Messages

10 m مضت

@ATTHelp @formerlyknownas Thank you, I appreciate the help from you both. 

New Member

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3 Messages

9 m مضت

If I have an AT&T-locked 3G phone and transfer the SIM card to a new AT&T-locked 3G phone, will I still be able to call and text after AT&T's 3G network shuts down? I don't care about mobile data or losing any other functions – I only need to be able to call and text. Thanks in advance for any advice!

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