EM7455 aggregation band on windows 10

[przenow2]

Hello, i have big problem (becouse my english is not well, maybe i not understand something), sorry for polish language in screenshoot in attachment.

I have EM7455 in my lenovo x260, and in device manager show me numbers but no COM3, if i try find my EM7455 in terminal it show error in russian language (i dont understand it).

Can u help me with aggregation band ? i want use only LTE 1800/2100

Sorry for the spelling mistakes, my english is really not good ;/

[JimHelms]

Have you downloaded the and installed the Sierra Wireless Software drivers for windows.

That allows the PC to communicate with the modem and COM ports.

[przenow2]

Yes "skylight" work great 3g/lte and gps

[JimHelms]

The problem is that allowing Skylight and/or Windows to control the modem, can place the modem in an undesirable composition. We have seen this on numerous occasions.

I would first uninstall Skylight, and all the Sierra Wireless software and components, and reboot the PC.

With the SIM Card removed, I would reinstall the Sierra Wireless software drivers for Windows and then see if the Huawei terminal will then see the Modem WAN COM port.

[przenow2]

It not work ;/ i try install also hvsa13ww and nz1wn10w from lenovo webpage and it not work same..

[JimHelms]

It sounds like, for whatever reason, you have lost your WAN Modem COM Port.

You may have to use a Linux machine to access the modem and restore it to OEM status.

[przenow2]

Ohh ;/ Do you have tutorial how do it ? I have bootable usb with linux but i dont remember witch one

[JimHelms]

Unfortunately, there is not a tutorial, but the issue has been addressed several times on the forum. I would try using the search function.

[JimHelms]

You might refer to THIS document.