05-06-2014 07:23 AM
I recently purchased Thinkpad E540 and upgraded to Windows 8.1.
i'm not able to use built-in 3G. I can see the connection under as the 'Mobile Broadband', but is greyed out and also shows 'Locked'.
Even in 'Change PC Settings, Networks' in not having any success. Only the 'Change Pin' and 'Remove Pin' button available, but this did not help.
Futhermore I tried upgrading the Ericsson N5321gw' Driver 7 firmware but still no luck.
Don't know what to do now.