Docomo Prime Series F-01B Instruction Manual page 21

Install the back cover as described below.
<Installing the back cover>
Align 8 tabs of the back cover with concaves of FOMA terminal.
While pressing the back cover in the direction of a so that there is
no gap between FOMA terminal and back cover, slide the back cover
in the direction of b to install, then slide the back cover lever in the
direction of c to lock.
Back cover
* Make sure that the back cover is completely closed without slack. Slide the
back cover in the direction of the arrow shown on the lever, and then make
sure the cover is securely locked before using.
Securely lock the back cover and firmly close the external connection
jack cap. Even a fine obstacle (one hair, one grain of sand, tiny fiber,
etc.) put between contact surfaces may allow water to enter.
Do not poke the microphone, earpiece or speaker with a swab or
sharp object.
Do not let FOMA terminal fall. It may become scratched causing the
waterproof/dustproof performance to degrade.
b
a
c
Lever
The external connection jack cap and the rubber packing of the inner
lid play an important role for keeping waterproof/dustproof
performance. Do not remove or scratch it. Also, prevent dust from
adhering to it.
To keep the FOMA terminal waterproof/dustproof, replacement of
parts is required every 2 years regardless of whether FOMA terminal
appears normal or abnormal. DOCOMO replaces the parts as a
chargeable service. Bring FOMA terminal to a sales outlet such as a
DOCOMO-specified repair office.
Important precautions
Do not perform actions shown in the illustrations below.
<Example>
Using Soap/Detergent/
Bath powder
Applying strong
water flow
Observe the following precautions to use FOMA terminal properly.
Accessories and optional devices are not waterproof/dustproof.
When watching 1Seg etc. with FOMA terminal installed in the
desktop holder, do not use it in a bath room, shower room, kitchen
or lavatory even if it is not connected to the AC adapter.
Washing with Washing by
brush/sponge laundry machine
Using in Soaking in
hot spring ocean water
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