Lenovo X301 - Manual (Page 90)

Before servicing ThinkPad X301
Removing the SIM card:
Some models of the ThinkPad X301 you are servicing might have the SIM card
that the customer has been installed.
If the computer you are servicing has the SIM card, remove it before you start the
servicing.
To remove the SIM card, you need to remove the battery pack first. (See “1010
Battery pack” on page 83.)
After you finish the servicing, make sure that you insert the card back into the slot
firmly.
Notice on disconnecting the cable from flip-lock ZIF connector:
Some cables used in the ThinkPad X301 are connected to the flip-lock ZIF
connectors.
When disconnecting the cable from those connectors, do as shown in this figure.
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2
82 ThinkPad X301 Hardware Maintenance Manual