Hi vetonabdiu,

For the SIM card to work your computer should have a WWAN card installed. If you ordered a WWAN card with/for your computer, check if the WWAN driver is installed by looking in the Device Manager. To check in the Device Manager:

1. Press and hold the Windows Key and then press the R key on the keyboard to launch Run Dialog Box.
2. Type “devmgmt.msc” and hit “Enter”.
3. Expand “Network adapters” and check what device is listed here. If the WWAN card is not listed here, expand the “Other devices” and check. See the image below:

If you have difficulty finding the drivers for the WWAN card:

1. Follow the above 3 steps and Double click the listed WWAN Card.
2. Click the “Details” tab.
3. Select Device Instance Path or Device Instance Id (whichever is available for your version of Windows) from the drop down box.
4. Make a note of the Device Instance Path or Device Instance ID and add this in your reply.

ok in network adapters i have :
Broadcom 802.11 Multiband network adapter
Intel (R) 82579LM Gigabit Network Adapter #2
Microsoft Virtual Miniport Adapter #2

And in the other device i have
Broadcom USH
Unknown device

can u tell me, do ia have a sim card reader or not ? Because i dont really understand it :S

post your Device Manager

a WWAN card is an optional feature which means you would have to pay EXTRA for it

I highly doubt you have one.

Instead of guessing, why don't you just check to see if you have a WWAN card.

ftp://ftp.dell.com/Manuals/all-products/esuprt_laptop/esuprt_latitude_laptop/latitude-e6520_owner%27s%20manual_en-us.pdf

Good day

I followed the instructions and this is what I found. 

USB\VID_413C&PID_818D\C51B75B462C05110

Regards

N Steenekamp