Nokia C7 - Manual (Page 10)

2 If the battery is inserted, lift the battery out.
3 Insert a SIM card. Make sure the contact area of the card is facing up.
Push the card in, until it locks into place.
4 Line up the contacts of the battery and the battery compartment, and insert the
battery.
5 To replace the back cover, direct the top locking hooks toward their slots first
and then press down until the cover locks into place.
10 Get started