Huawei Technologies Co. Ltd Q21F Manual Do Utilizador

This section contains important information about the operation of your device. It also 

contains information about how to use the device safely. Read this information carefully 

before using your device.
Electronic device

Do not use your device if using the device is prohibited. Do not use the device if doing 

so causes danger or interference with other electronic devices.
Interference with medical equipment

Follow rules and regulations set forth by hospitals and health care facilities. Do not 

use your device where prohibited.

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Some wireless devices may affect the performance of hearing aids or pacemakers. 

Consult your service provider for more information.

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Pacemaker manufacturers recommend that a minimum distance of 15 cm be 

maintained between a device and a pacemaker to prevent potential interference with 

the pacemaker. 

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Do not use the device where flammables or explosives are stored (in a gas station, oil 

depot, or chemical plant, for example). Using your device in these environments 

increases the risk of explosion or fire. In addition, follow the instructions indicated in 

text or symbols.

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Do not store or transport the device in containers with flammable liquids, gases, or explosives.

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Operating environment

Avoid dusty, damp, or dirty environments. Avoid magnetic fields. Using the device in 

these environments may result in circuit malfunctions.

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Place the device on a stable surface.

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electric fields, such as cable modems with wireless functions, cordless phones, Wi-Fi 

routers, power line communication modems, mobile phones, microwave ovens, and 

fridges.

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Keep the device away from electronic appliances that generate strong magnetic or 

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During thunderstorms, power off your device and remove all cables connected to it to

protect against lightning strikes.

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Ideal operating temperatures are 0°C to 40°C. Ideal storage temperatures are 0°C to 

40°C. Extreme heat or cold may damage your device or accessories.

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Keep the device and accessories in a well-ventilated and cool area away from direct

sunlight. 

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To protect your device or accessories from fire or electrical shock hazards, avoid rain

and moisture.

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Keep the device away from sources of heat and fire, such as a heater, microwave 

oven , stove, water heater, radiator, or candle.

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Do not place any object, such as a candle or a water container, on the device. If any 

foreign object or liquid enters the device, immediately stop using it, power it off, and 

remove all cables connected to it. Then, contact an authorized service center.

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Do not block device openings. Reserve a minimum of 30 cm around the device to

dissipate heat.

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Stop using your device or applications for a while if the device is overheated. If skin is

exposed to an overheated device for an extended period, low temperature burn 

symptoms, such as red spots and darker pigmentation, may occur.

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Do not allow children or pets to bite or suck the device or accessories. Doing so may

result in damage or explosion.

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Keep the device in a place with good reception. The distance between the device and 

other metal materials (such as metal brackets or metal doors and windows) should be 

greater than 25 cm.

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Comply with all precautions with regard to child’s safety. Letting children play with the

device or its accessories may be dangerous. The device includes detachable parts that 

may present a choking hazard. Keep away from children.

Using an unapproved or incompatible power adapter, charger or battery may cause 

fire, explosion or other hazards.

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Choose only accessories approved for use with this model by the device manufacturer. 

The use of any other types of accessories may void the warranty, may violate local 

regulations and laws, and may be dangerous. Please contact your retailer for information 

about the availability of approved accessories in your area.

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The power plug is intended to serve as a disconnect device.

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For pluggable devices, the socket-outlet shall be installed near the devices and shall be 

easily accessible.

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Unplug the power adapter from electrical outlets and the device when not in use.

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Do not drop or cause an impact to the power adapter. If it is damaged, take it to an 

authorized service center for inspection.

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If the power cable is damaged (for example, the cord is exposed or broken), or the plug 

loosens, stop using it at once. Continued use may lead to electric shocks, short 

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Do not touch the power cord with wet hands or pull the power cord to disconnect the

power adapter.

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Do not touch the device or the power adapter with wet hands. Doing so may lead to 

short circuits, malfunctions, or electric shocks.

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If your power adapter has been exposed to water, other liquids, or excessive moisture, 

take it to an authorized service center for inspection.

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Do not connect battery poles with conductors, such as keys, jewelry,or other metal 

materials. Doing so may short-circuit the battery and cause injuries or burns.

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Keep the battery away from excessive heat and direct sunlight. Do not place it on or in 

heating devices, such as microwave ovens, stoves,or radiators. Batteries may explode 

if overheated.

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Do not attempt to modify or remanufacture the battery, insert foreign objects into it, or 

immerse or expose it to water or other liquids. Doing so may lead to fire, explosion, or 

other hazards.

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If the battery leaks, ensure that the electrolyte does not make direct contact with your 

skins or eyes. If the electrolyte touches your skins or splashes into your eyes, 

immediately flush with clean water and consult a doctor.

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In case of battery deformation, color change, or overheating while storing, immediately 

stop using the device and remove the battery. Continued use may lead to battery 

leakage, fire,or explosion.

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If the battery is improperly replaced, it may explode. Replace the battery with the same 

or equivalent type only.

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Do not put batteries in fire as they may explode. Damaged batteries may also explode.

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Dispose of used batteries in accordance with local regulations. Improper battery use 

may lead to fire, explosion, or other hazards.

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Do not smash or pierce the battery, or expose it to high external pressure. Doing so 

may lead to a short circuit or overheating.

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Do not drop the device or battery. If the device or battery is dropped, especially on a 

hard surface, it may be damaged.

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During storage, transportation, and operation of the device,keep it dry and protect it 

from collision.

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Keep the device and accessories dry. Do not attempt to dry it with an external heat 

source , such as a microwave oven or hair dryer.

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Do not expose your device or accessories to extreme heat or cold. These environments

may interfere with proper function and may lead to fire or explosion.

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Do not allow children or pets to bite or suck the battery. Doing so may result in damage

or explosion.

Before connecting and disconnecting cables, stop using the device and disconnect it 

from the power supply. Ensure that your hands are dry during operation.

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Avoid collision, which may lead to device malfunctions, overheating, fire, or explosion.

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If the device is not going to be used for an extended period of time, power it off, and 

remove all cables connected to it.

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If anything unusual occurs (for example, if the device emits smoke or any unusual 

sound or smell), immediately stop using it, power it off, remove all cables connected to 

it, and contact an authorized service center.

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Do not trample, pull, or excessively bend any cable. Doing so may damage the cable,

causing the device to malfunction.

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Before you clean or maintain the device, stop using it, stop all applications, and 

disconnect all cables connected to it.

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Do not use any chemical detergent, powder, or other chemical agents (such as alcohol

and benzene) to clean the device or accessories. These substances may cause 

damage to parts or present a fire hazard. Use a clean, soft, and dry cloth to clean the 

device and accessories.

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Do not place magnetic stripe cards, such as credit cards and phone cards, near the 

device for extended periods of time. Otherwise the magnetic stripe cards may be 

damaged.

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The device and its accessories (if included), such as the power adapter, headset, and 

battery should not be disposed of with household garbage.

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Disposal of the device and its accessories is subject to local regulations. Support 

proper collection and recycling.

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Keep the device at least 60 cm from other electric devices to protect it from electric 

and magnetic interference (EMI).

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Do not wrap or seal the device, place other objects such as cable modems, cordless 

phones, mobile phones, players, and books on or beneath the device, or cover the 

device with towels.

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Do not place the device in a container with poor heat dissipation, such as a box or bag.

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circuits, or fire.

Do not dismantle or remanufacture the device and its accessories. This voids the 

warranty and releases the manufacturer from liability for damage. In case of damage, 

contact an authorized service center for assistance or repair.

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