My Phone Number shows as unknown

[Kneth]

When I go to Settings -> about device-> status ->My Phone Number shows as unknown.

SIM 1 - The number is shown correctly
SIM 2 - Unknown

*#*#4636#*#* - Does not work

How can I add my number on to the SIM without rooting my device?

Android 12
One UI 4.1
Samsung SM-A715F/DS (Galaxy A71)

 

[mustang7757]

Hi, curious why would u want out them on your sim? They can fail and u would lose them most people have numbers back up in their Google account.

If your set on doing this go to contact app> 4 hamburger bars on left side tap and you can port them to your sim card

 

[Kneth]

Hi, Thank you for your response.
No, I dont want to add ALL my contacts to the SIM, as they are alredy safely added to my Google Account.
It is just that one of my numbers are shown as 'Unknown' in the About Phone.

 

[mustang7757]

Oh I gotcha, you have dual sim cards or 1 sim another E-sim?