Dell P133G Service Manual page 24

Steps
1. Using a plastic scribe, pry and remove the WWAN card shield covering the WWAN card.
NOTE: Pry open the WWAN card shield from the recess.
2. Loosen the single (M2x2.5) screw and remove the WWAN-card bracket.
3. Disconnect the antenna cables from the connectors on the WWAN card.
4. Slide and remove the WWAN card out from the M.2 slot on the system board.
24 Removing and installing components