SIM PIN2 to unlock mobile broadband device

I have two solution either update your windows 10 or try to restore os from recovery disk.

Though at&t is your internet provider but here error is related to software operating system so either Lenora or Microsoft can provide solution. To sim unlock pin for at&t here is the way mobile-cellphones.blogspot.com/2017/09/how-to-network-unlock-att-mobile.html.

I have two solution either update your windows 10 or try to restore os from recovery disk.

Though at&t is your internet provider but here error is related to software operating system so either Lenora or Microsoft can provide solution. To sim unlock pin for at&t here is the way mobile-cellphones.blogspot.com/2017/09/how-to-network-unlock-att-mobile.html.

The solution is to install the newest firmware and drivers from Sierra for your broadband network-card.

Many pc's use a windows driver for this card, and that is not working.

Worked for my "stone-old" Fujitsu pc.

same problem dell with dell latitude

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.

HELP!

[Moved from: Windows Insider Program / Windows Insider Preview / Install, upgrade, and activate / PC ]

I had the same problem on my Lenovo. It was working OK and then for no reason it would not connect to internet and told me I needed to enter the SIM PIN2.

After some time I discovered there were fixed IP addresses and subnet codes in the IP4 and IP6 settings.

Network Connections >> right click on the Mobile adaptor >> Properties >> double click on the Internet Protocol Version 4 (TCP/IPv4) >> set to Obtain an IP address automatically.

Leave the DNS server addresses as they are if they are in there.

Do the same for (TCP/IPv6)

thank you so much man I think it should be the solution for almost everyone

now i found out why this happened to me. recently I installed a WiFi hotspot software and that changed the ip addresses and be aware that there is a lot of softwares that can cause network problems