sim card remain "searching"

Hello everyone,

This is Jerrel.

Recently there's a problem bother me a lot...

My iPhone 8+ all of a sudden could not detect the sim card, and says "searching."

Even I restarted my iPhone, re-insert the sim card, or update my iOS into the lasses version.

I would like to know is it the hardware problem?

Or there's any other way that I could make it work again?

I studies in Germany now, and I bought this one in Taiwan (for 18 months).

Without the function of sim card, I could not use the Cellular and phone call anymore....

Please feel free to share if you had similar experience or solution.

Thanks a million!

Best,

Jerrel