Casio IT-G400-C21M Hardware Manual page 19


When installing SIM card and microSD card, check direction of card and insert card
correctly. It can cause falure if card is inserted using force or reversely. Battery pack can
not be installed properly if SIM card is not properly inserted.

Use AC adaptor while using USB cable or USB cradle. Battery pack might not be charged
and battery level might get lower if IT-G400 is used with high load situation.

It is required to start carrier service to use the LTE/W-CDMA/GSM functions. Available
LTE/W-CDMA/GSM functions might be dependent on each carrier.

GPS function
 It might take a long time to fix location when IT-G400 is used for the first time or after
a long period from last time use. In such case, start GPS in place with no obstacles
nearby and wait for 15 minutes or longer.
 GPS uses signals emitted by the satellites operated by the United Sates. Accuracy of
fixed location might be affected by the condition of satellites.
 GPS module might not be able to receive signals in building and tunnel.
 If it needs to installed in car, check and install IT-G400 at best location it can receive
enough signals.

WLAN function
 It is irreagal to use IEEE802.11a/n 5.2GHz/5.3GHz（W52/W53）outside of building in
Japan.
 To ensure compliance with local regulations, be sure to follow the regulation of the
country in which the access point is installed.

LCD Display
 There might be some defective dots. LCD display charasteristic allows that some
defective dots exist, so it is not failure.
 When screen is pushed hard, pushed mark might occur on LCD disply. It is not failure.
Power off and power on IT-G400, then pushed mark should disappear.
 When same contents display for long time, afterglow might occur after switching
different contents. It is not failure. Wait for some time, then afterglow should
disappear.

Be careful about chemical like thinner, gasoline, coal oil, flux, cleaner, glue, paint,
chemicals or cosmetic. These chemicals can cause discoloration and damage to resin case
and cover.

When IT-G400 is dirty, wipe it clean with a soft, dry cloth. Do not rub on screen hardly to
avoid scratch on it.

Keep power supply and data communication terminals clean. It might cause connection
data transfer and charge defect by getting dirty, as well as firing by getting wet. For
cleaning, use dry cotton swab after plug off AC adaptor.

IT-G400 has waterproof specification, but make sure to oberve below items.
 Wipe with dry towel if it gets showered and very wet.
 Be careful to use IT-G400 in rain like other electrical products.
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