Lenovo A10-70 Tablet - Manual (Page 54)

Lenovo A7600 Hardware Maintenance Manual
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3. Peel off the mylar on the SIM board FPC connector on the main board.
Figure 7-3. Peeling off the mylar at the main board end
4. Unlock the SIM board FPC connector on the main board using a guitar pick
or a thin flat blade.
Figure 7-4. Unlocking the SIM board FPC connector (main board end)