X61 WWAN Clarification

[rannahmias]

Hi,
This may be a dumb question, but I can't find the answer anywhere....
I have an X61 (7675-59U) that came with Verizon WWAN. I'd like to change it to AT&T. I know I can use MC8765 or MC8775 (if you can point me to pin 20 trick it will save me some time).
HOWEVER, when I opened the dimm door I found a card with a SIM slot. Wasn't ready for it.... Verizon doesn't use SIM.
Can someone shed light on what I found? Do I need to buy another piece of hardware or is it just a software change?
I tried to plug my AT&T data SIM into the slot but it didn't seems to get me connected to anything
TIA,
-ran

[EOMtp]

...if you can point me to pin 20 trick it will save me some time ...
... Verizon doesn't use SIM.

Hold the card with label on top and "pins" pointing to you: Pin-1 is top left. Pin-20 is the 2nd pin on the bottom counting starting at the right of the "cut" (key) in the circuit board. See this: http://www.hardwarebook.info/PCI_Express_Mini_Card

If the WWAN card is CDMA (i.e., Verizon EV-DO or similar) then the SIM card holder is not applicable and does not matter what you place there, if anything. If the WWAN card is GSM (i.e., AT&T or similar), then the SIM card holder must contain a valid card for a GSM WWAN account.

[adrianaitken]

Ran, do you mean the trapdoor on the bottom of the laptop ? That's where the SIM card is (if needed) but the actual WWAN card is under the righthand side of the paml rest - you need to remove the keyboard and top cover to see it.

[rannahmias]

Ran, do you mean the trapdoor on the bottom of the laptop ? That's where the SIM card is (if needed) but the actual WWAN card is under the righthand side of the paml rest - you need to remove the keyboard and top cover to see it.

Thank you - I thought it was one piece. Would you know if I can swap the Verizon card with an AT&T card (off of eBay) and make it work? Is the SIM module even connected to the card if the laptop was sold as a Verizon one?

-ran

[rannahmias]

If the WWAN card is CDMA (i.e., Verizon EV-DO or similar) then the SIM card holder is not applicable and does not matter what you place there, if anything. If the WWAN card is GSM (i.e., AT&T or similar), then the SIM card holder must contain a valid card for a GSM WWAN account.

Thank you. I guess what I am trying to figure out now is if the Verizon WWAN card can be swapped by me to an AT&T card...... any ideas?
-ran