Showing No sim card inserted

[Pokeylamia]

I have been using Samsung M31 for past 6 months and now it is showing : 

 No simcard inserted; even though airtel simcard is inserted.

I have tried with other simcards also which are working well but it is still showing the same...

Can someone help me in solving this...it would be a great help to me.☺

Network is crossed as if there is no simcard inserted in it:

[aakash__r_k]

Change the sim slot

[Pokeylamia]

I tried that but it is still the same

[ktvijesh]

Consult a samsung service centre

[Anonymous]

Insert 2 simcards and see if one is disabled.

[Samsung_Support2 · Accepted solution]

Dear Samsung Member,

Greetings from Samsung Customer Support!

To resolve your device network issue please visit this link: https://www.samsung.com/in/support/mobile-devices/samsung-mobile-network-issues/#:~:text=1%20Check%2....

For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).

Thank you for writing to Samsung.

Warm Regards,
Samsung Customer Support

[KaushikApurbo]

Same issue with my M31 after recent update. It says no Sim Card

[Pokeylamia]

I think the only way is to consult with Samsung service center. I tried lot of ways to solve it but ended up going to service center.
They will fix the problem for sure... It might take 1 day.

[KaushikApurbo]

Plz if someone can help here