Xiaomi Redmi Note 9T, User Manual, Page: 102 / 110

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Emergency Alerts
・Receive setting is enabled at time of purchase.
・If "Use full volume" is disabled, alarm does not sound in
Silent mode. To disable:
In Home Screen,
(Settings) Passwords & security
Emergency alerts Use full volume ( )
・Handset vibrates regardless of Silent mode setting. To
disable handset vibration:
In Home Screen,
(Settings) Passwords & security
Emergency alerts Vibration ( )
・Emergency alerts may not be received during calls or
transmissions, or when signal is weak.
・Depending on usage/situation, handset may receive
emergency alerts for other areas or no emergency alerts.
・While receive setting is enabled, standby time is shorter.
・SoftBank Corp. is not responsible for damages caused
by using this service, including accidents resulting from
received information, reception timing, or reception/
reception failure.
Volume
・Do not listen for a prolonged period at high volume; may
hurt ears.
Technical Conformance Certification
・Handset conforms to technical regulations pursuant to the
Radio Law as a wireless radio station facility of a low-
power data transmission system, and the mark of technical
conformity
can be viewed as follows:
In Home Screen, (Settings) About phone
Certification
・Handset conforms to technical regulations, and its
disassembly/modification may be punishable under law.
Bluetooth
®
/Wi-Fi (WLAN)
Connection/operation may not be possible with some
Bluetooth
®
/Wi-Fi (wireless LAN) devices.
Handset Bluetooth
®
/Wi-Fi (wireless LAN) communication is
secured in conformity with Bluetooth
®
/Wi-Fi (wireless LAN)
standards, however, security may be insufficient depending on
system environment and settings. Be aware of this when using
Bluetooth
®
/Wi-Fi (wireless LAN) communication.
SoftBank Corp. is not responsible for damages from leakage of
data or information occurring using Bluetooth
®
/Wi-Fi (wireless
LAN) communication.
Frequency Bands (2.4 GHz Band)
Frequency band used by handset Bluetooth
®
/Wi-Fi (WLAN)
functions are as follows:
2.4: Frequency band is 2400 MHz
FH/XX/DS/OF: Modulations are FH-SS, other modulation, DS-
SS, OFDM
4: Estimated range of radio frequency interference is up to
40 m
8: Estimated range of radio frequency interference is up to
80 m
: Utilizes 2,402 MHz to 2,482 MHz band without mobile device
bandwidth differentiation
・Available channels may vary by country.
・For use in an airplane, contact your airline.
Frequency Bands (5 GHz Band)
Handset can use 5.2 GHz (W52), 5.3 GHz (W53), and 5.6 GHz
(W56) bands within the 5 GHz frequency band.
・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, 144 ch)
Using a 5.2/5.3-GHz-band wireless LAN outdoors is prohibited
by law (this does not apply to communication with access
points/relay stations of high-output data communications
systems operating in the 5.2 GHz band).