Hello,
Welcome to Microsoft Community.
On Surface Go 3, you should check Surface Mobile Broadband, not the modem driver. Also check for devices with exclamation marks or question marks within the device manager, you can right click to uninstall them and then restart the Surface to see if it changes.
If you still can't find them, you can
1.Manually install driver
Download Surface Go 3 Drivers and Firmware from Official Microsoft Download Center
2.Toggle LTE off and then on in UEFI
Shut down your Surface and wait about 10 seconds to ensure it's off.
Press and hold the Volume-Up button and - at the same time - press and release the Power button.
As the Microsoft or Surface logo appears on your screen, continue to hold the Volume-Up button until the UEFI screen appears.
3.Reset Surface
Restore or reset Surface for Windows - Microsoft Support
4.If it still doesn't work, there may be a hardware failure.
How to get service or repair for Surface - Microsoft Support
**Note:**Surface****is now supported on Microsoft Q&A.
Starting from June 27, 2025 , new questions must be posted there. Existing discussions will remain accessible on Microsoft Answers until [June 29, 2025].
Customers will be redirected to Q&A starting [June 30, 2025].
https://learn.microsoft.com/answers/questions/
Best regards,
Ian Trinh | Microsoft Community Support Specialist