My new Laptop is a Lenovo T470s (S/N PC0PXLX1) with a "Sierra Wireless EM7455 Qualcomm Snapdragon X7 LTE-A" WWAN card.
After working well for 6 weeks, I am now unable to get an internet connection using that adapter.
Windows 10 network diagnostics tells me I need to "Enter a SIM PIN2 to unlock the mobile broadband device". I can find no way to enter anything.
Tech support at both AT&T and Lenovo have never heard of SIM PIN2 and each blames the other for the problem. I have talked to each several times and have been referred to "advanced tech support."
My internet provider is AT&T.
This community has referred to a "provider specific software" that solved one participant's similar problem.
My provider, AT&T, has given me two PUK numbers. I suspect their PUK2 may be the SIM PIN2, but I still have no way to utilize that information.
[Moved from: Windows Insider Program / Windows Insider Preview / Install, upgrade, and activate / PC ]