Note:
Some ThinkPad Edge E320 and E325 models you are servicing might have the SIM card that the customer has installed. If the computer you are servicing has the SIM card, remove it before you start the servicing. To remove the hard disk drive door, you need to remove the battery pack first (See Battery pack).

Please perform the following steps as shown in the picture below.

After you finish the servicing, make sure that you insert the card back into the slot firmly.