My BSNL EVDO 3.1 Mbps usb modem is working with all samsung, dell laptops and my pc but not working in lenovo?

I have pc, dell 5010 laptop, samsung laptop, lenovo C340 all in one pc, lenovo laptop.
In lenovo laptop and all in one has problem with EVDO.
sometimes evdo is connect in lenovo but after 3 mins its not responding. Ervery time i connect it loose coverage.It has no coverage problem with samsung or dell at same spot.
i think it has some driver problem in lenovo.
i have windows 7 ultimate in all pc and laptop.
Please Help me…
i can't sale lenovo pc and my own pc is dead.So i have two choices.
1.buy a new pc

2.take lenovo to sevice center.

I need answer in 3 to 4 days.

Guest

If your BSNL EVDO is not working its nothing to do with the Lenevo laptop.
Since you mentioned its not responding. There may be issue with the dialer software on driver issues on that particular Laptop.

1, You have to perform modem diagnostics to check your EVDO
Go to Network and sharing center > Change Adapter Settings> Right click particular modem> Properties> Diagnostics.

2, Uninstall Reinstall Universal Serial Bus Controllers drivers from Device Manager

Dakshina MURTHY