After using few days, the SIM 2 will stop to support the exist SIM card and showed "SIM card not found ", but the SIM card is indeed exist.
I suggest try another SIM card. It can become defective and wear out over time.
Your mobile operator/carrier should provide a replacement SIM for free when the issue is explained to them.
Please let us know how it goes?
Hi again Jerry,
For reference please, the SIM from which mobile operator/carrier, in which country, is causing the issue?
- In case others in the forum get a similar issue later.
I believe we can rule out any mechanical defects in the phone, if the issue follows the SIM card when the cards are swapped?
If all SIM cards fail when inserted in #2 slot, then I suggest have the phone examined by a qualified technician.
The official Nokia service options and the procedures vary by location:https://www.nokia.com/en_int/phones/support
and scroll down the page to the section Service and repair.
(There is a language selector at the bottom of the page).
I hope you get it sorted out.
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