SIM Card Showing 'Unknown' in both SIM manager and About Phone Section

[izephyr]

In the about section, Phone Number shown as "Unknown" for some SIM cards, happens for both physical SIM and eSIM. I have contacted operator and everything is fine from their end. There's a workaround, for physical SIM. If the SIM is inserted in other brand Android like Lenovo etc, the number in the SIM can be updated manually and then if re-inserted on Galaxy devices, the 'Unknown' is gone and the number is displayed. So other Android devices can fix this issue. The easiest solution is, however, to insert the SIM into an iPhone. It will automatically update the number in the phone if it is not there & when re-inserted the SIM to the Galaxy devices, it'll work and the phone number's shown. 

So, other phones can read-write phone number in the SIM if it is not there. For eSIM, there is no solution as it cannot be moved to iPhone or another Android.

& VOLTE does't work if the SIM number is not present. once updated, it works. Tested with S22 Ultra, A51, A34 5G, S21FE

Please Fix or add.

[Member23]

Also S23 when I receive an email from Samsung, it says Device "Unknown"

[izephyr]

And yes, I have sent the feedback through Members app. I have never got any suggestions implemented though.

[KiwiBird97]

Are you using a travel SIM (Ubigi, Airalo, etc.)? That could be the culprit.

[izephyr]

No. I am using SIM from Grameenphone/Airtel.

Interesting thing is my travel e-sim from dTec Thailand is showing the number. But for those in which the number is not shown, has the same problem.

[izephyr]

 

 

[userOAYocbUuCW]

Will this work by putting the SIM in an iPad? I don't have access to an iPhone and have the same problem. Thank you.

[izephyr]

I hope it will work. You can try. I did not check with iPad