Sony Xperia Z4 Tablet User Manual Download

Page: 191 / 206

189

Safety Precautions

Xperia™ Z4

Wi-Fi (WLAN)

・Wi-Fi (WLAN) uses radio waves to exchange information

and LAN connection is freely established within an area
where the radio wave reaches. Meanwhile, if no security is
set, Wi-Fi communications may be intercepted or hacked
by malicious parties. It is recommended to make necessary
security settings on your responsibility.

・Use handset WLAN function only in Japan.
・Do not use Wi-Fi near magnetic devices such as electrical

appliances or AV/OA devices. Magnetic/radio waves
may hinder or disable communication. Avoid microwave
ovens especially. Using near a TV or radio, etc. may cause
interference; may affect TV reception.

・If there are multiple Wi-Fi access points using the same

channel, search may fail.

・Enable Wi-Fi to search available Wi-Fi networks and then

establish connection.

・Connect to Wi-Fi network before accessing Internet via Wi-

Fi (WLAN).

・Take care with radio signal strength for Wi-Fi (WLAN).

Radio signal strength for Wi-Fi network differs depending
on the access point location. Moving close to a Wi-Fi router
may improve radio signal strength.

・To save battery power, disable Wi-Fi (WLAN) when not used.

Notes on Using 2.4 GHz Devices

WLAN devices operate on the same frequency band used by
home electric appliances such as microwave ovens, industrial,
scientific and medical equipment, premises radio stations
for identifying mobile units used in the manufacturing lines
of plants (radio stations requiring a license), specified low
power radio stations (radio stations requiring no license) and
amateur radio stations.

・Before using handset, confirm that premises radio stations,

specified low power radios, and amateur radio stations are
not in use nearby.

・In the event of handset causing harmful radio wave

interference with premises radio stations for identifying
mobile units, promptly change the operating frequency or
stop radio wave emission by turning off the power, etc. and
then contact a SoftBank Shop or

SoftBank Customer Support

for measurement against the cross talk (e.g. installing
partition.)

・Also, in the event of handset causing radio wave

interference with specified low power radios and amateur
radio stations, contact a SoftBank Shop or

SoftBank

Customer Support

Notes on Using 5 GHz Devices

In 5 GHz frequency bandwidth, handset can use following
bands:

・5.2 GHz band (W52/36, 40, 44, 48 ch)
・5.3 GHz band (W53/52, 56, 60, 64 ch)
・5.6 GHz band (W56/100, 104, 108, 112, 116, 120, 124,

128, 132, 136, 140 ch)

Using wireless LAN built-into handset in 5.2/5.3 GHz outside
is prohibited by the Radio Law.

Reception Interference Caused by

Bluetooth

Devices

Bluetooth

and WLAN (IEEE802.11b/g/n) use the same

frequency band. Using near Wi-Fi (WLAN) devices may cause
radio interference, low-communication speed, noise or
connection fault. Or may cause communication interruption or
sound distortion when streaming data is played. In that case,
take the following measures.

・Provide distance between Wi-Fi (WLAN) device and

Bluetooth

device. Required distance varies by device.

・If the problem persists, power off Bluetooth

device.