I bought a DELL notebook with LTE modem Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A. After that, I installed Whireshark with NPCap.
After that, my WWAn connetion didn’t work more.
I used the windows troubleshooter and it sometimes put a result to me, I have to add my PIN2 number.
After that, I googled a lot, and I find this article.
Uninstalled NPCap, and the LTE modem works very well.