eSIM/dual SIM on AT&T variant

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TGUY25

Senior Member
Nov 8, 2014
90
16
Got my AT&T variant today. Doesn't look like eSIM funcationality is enabled. Second IMEI and eSIM shown but greyed out and no way to activate. Is this true? If so, does anyone know if unlocked version allows for eSIM use so you can get dual sim? I need dual SIM for both US (AT&T) and international travel (Singapore).
 

TGUY25

Senior Member
Nov 8, 2014
90
16
well that's a bummer. Hopefully someone will come up with some firmware or we'll see a country release the 4G version of the phone that will work in the US and support dual SIM. I do, however, use wifi calling a lot and right now the iPhone seems to be the only choice that can be AT&T wifi calling compatible and dual sim.

Thanks for letting me know - i also had an order for the unlocked variant that I will cancel.
 

uicnren

Senior Member
Jun 19, 2007
1,327
500
Google Nexus 5
Google Pixel 4 XL
.... I do, however, use wifi calling a lot and right now the iPhone seems to be the only choice that can be AT&T wifi calling compatible and dual sim....

Pixel 4/4XL unlocked versions (as well as bought thru AT&T) will do Wi-Fi calling and HD Voice on AT&T (sometimes requires a little work on your part to bug AT&T).
Also, I cannot find anyway to do Wi-Fi calling on the Flip, let alone HD Voice, though it is perfectly clear with calls I have made so far.
 

TGUY25

Senior Member
Nov 8, 2014
90
16
I bought the ATT version of the flip so getting wifi calling. I didn’t think Pixel 4 was dual sim? Before various bans, I had decent luck getting HD voice on Huwawei phones but never WiFi calling unless ATT firmware (or iPhone)
 

uicnren

Senior Member
Jun 19, 2007
1,327
500
Google Nexus 5
Google Pixel 4 XL
I bought the ATT version of the flip so getting wifi calling. I didn’t think Pixel 4 was dual sim? Before various bans, I had decent luck getting HD voice on Huwawei phones but never WiFi calling unless ATT firmware (or iPhone)

Typical AT&T treatment of BYOD with regards to Wi-Fi.

Pixel 4's are physical SIM and eSIM.

Basically you can (if you find a tech who can/will) provision the account with an IMEI that supports those features, and your SIM is current, it will/should work. My 4XL is currently set up like this (and previous Pixels as well).
 

TGUY25

Senior Member
Nov 8, 2014
90
16
Thx didn’t know about the pixel 4 - I did the same thing with IMEI numbers. I bought a cheap galaxy phone from ATT for the sole purpose of having an IMEI that shows ATT. It won’t help WiFi calling which needs firmware support but has consistently gotten HD voice to work. Hopefully a different variant of the flip will show up with dual sim support that can be used on the ATT network
 

TGUY25

Senior Member
Nov 8, 2014
90
16
It gave me the option to setup when I ran. Y hone setup. It’s all under connections in setting or you can search setting for WiFi calling. I believe this is only available with the ATT firmware
 

WarlockLord

Senior Member
Mar 22, 2006
961
656
On the unlocked version, I was able to access the hidden SIM manager menu using Activity Launcher and enable the second SIM. However, even after doing so, it doesn't seem that I can do much with it.
 
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TGUY25

Senior Member
Nov 8, 2014
90
16
I saw same you can see it but it's not really enabling it (under about phone, esim is still greyed out). I bought a European Version of the phone that is supposed to have dual sim enabled and is arriving tomorrow - I will report back if I can add my AT&T plan to the eSIM and use my SG SIM card on the second line and how it works. Even if I get that to work, i will have to give up wifi calling (since not an AT&T variant of the phone) and usually - Samsung pay doesn't work (but usually google pay does). i will report back. Love the phone but without the ability to use 2 SIMs, it will sadly be doing back.
 

WarlockLord

Senior Member
Mar 22, 2006
961
656
I saw same you can see it but it's not really enabling it (under about phone, esim is still greyed out). I bought a European Version of the phone that is supposed to have dual sim enabled and is arriving tomorrow - I will report back if I can add my AT&T plan to the eSIM and use my SG SIM card on the second line and how it works. Even if I get that to work, i will have to give up wifi calling (since not an AT&T variant of the phone) and usually - Samsung pay doesn't work (but usually google pay does). i will report back. Love the phone but without the ability to use 2 SIMs, it will sadly be doing back.

I thought that the Wi-Fi calling piece was becoming more universally supported, regardless of variant. I have the unlocked version and Verizon Wi-Fi calling (and HD calling) are both working.
 
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gapemd

New member
Feb 26, 2020
1
0
Hi, I got one in Czech Republic and the dual sim (eSim/normal Sim) dual standby. the setting for eSIM are under Connections>>Sim card Manager, there should be a section with eSIMS and you select 'add mobile plan' (in CZ you scan the barcode of the eSIM thats provided by the operator). Wifi calling is in the phone app under call settings and can be activated for both sim 1 and sim 2 at the same time
 

TGUY25

Senior Member
Nov 8, 2014
90
16
I got the UK version of the phone. I have an AT&T phone number on an eSIM and have the eSIM card (with the QR code). I removed the plan from my old device (a Galaxy Fold Dual SIM I bought in Singapore that worked fine with both SIMS) and then tried to "add the plan" onto my new flip. I scanned the QR code and get the message "Your mobile plan is already being used on another device. For more information, contact your service provider.: I called AT&T and advanced tech support added the new IMEI's(both physical and eSIM) to that number on their end but still getting the error. They were at a loss for a solution. Any ideas on how to fix this? Really love the phone though useless to me without the ability to use an eSIM for my AT&T number.
 

TGUY25

Senior Member
Nov 8, 2014
90
16
BTW, yes to calls over LTE (VoLTE) with AT&T SIM on UK variant of the phone and, not surprisingly, no joy on Wifi Calling
 

shahabtrdenz

New member
Mar 8, 2020
1
0
Are both SIMs 3G capable?

I got the UK version of the phone. I have an AT&T phone number on an eSIM and have the eSIM card (with the QR code). I removed the plan from my old device (a Galaxy Fold Dual SIM I bought in Singapore that worked fine with both SIMS) and then tried to "add the plan" onto my new flip. I scanned the QR code and get the message "Your mobile plan is already being used on another device. For more information, contact your service provider.: I called AT&T and advanced tech support added the new IMEI's(both physical and eSIM) to that number on their end but still getting the error. They were at a loss for a solution. Any ideas on how to fix this? Really love the phone though useless to me without the ability to use an eSIM for my AT&T number.

I gonna buy the UK model and so I can use both my personal and company numbers on one phone.
My company's number is nano sim and the supports 3G and 4G
My personal number is esim and supports 3G and 4G
Neither my personal nor company number network support 2G.

I read somewhere that while Z Flip is dual sim, one of the sims only support 2G. is that right? Can anyone confirm it?
 

TGUY25

Senior Member
Nov 8, 2014
90
16
went to AT&T store, moved my old esim (galaxy fold) to a physical sim, activated and tested on physical SIM then converted it again to eSIM (new QR code). Worked! Had trouble going from eSIM to eSIM but converting to physical SIM in the middle of the process (something I read on another forum) fixed it.
 
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    I saw same you can see it but it's not really enabling it (under about phone, esim is still greyed out). I bought a European Version of the phone that is supposed to have dual sim enabled and is arriving tomorrow - I will report back if I can add my AT&T plan to the eSIM and use my SG SIM card on the second line and how it works. Even if I get that to work, i will have to give up wifi calling (since not an AT&T variant of the phone) and usually - Samsung pay doesn't work (but usually google pay does). i will report back. Love the phone but without the ability to use 2 SIMs, it will sadly be doing back.

    I thought that the Wi-Fi calling piece was becoming more universally supported, regardless of variant. I have the unlocked version and Verizon Wi-Fi calling (and HD calling) are both working.
    1
    went to AT&T store, moved my old esim (galaxy fold) to a physical sim, activated and tested on physical SIM then converted it again to eSIM (new QR code). Worked! Had trouble going from eSIM to eSIM but converting to physical SIM in the middle of the process (something I read on another forum) fixed it.
    1
    Yes, I have 2 AT&T numbers on the same phone - one is eSIM and one is physical SIM