Cisco 8821 Setup page 11

Phone Setup
b) Press the cover firmly against the phone until it clicks in place.
Press at the top, middle, and bottom of the cover on each side.
Caution
c) Check that the cover is flush with the phone, then slide the lock to the right to lock the cover in place.
Do not force the cover down. If it doesn't click into place easily, remove the cover and check
that the battery is inserted correctly.
Replace the Cisco Wireless IP Phone 8821 Battery
Phone Setup
11