AT&T WF721 User Manual

Troubleshooting

Safety Instructions

• Some electronic devices are susceptible to

electromagnetic interference sent by devices that may not

be adequately shielded. For best performance, position

the Wireless Home Phone device as far from these types

of devices (TV sets, radios and other automated office

equipment) as possible (at least 8 feet) so as to avoid

possible electromagnetic interference.

• Do not use the device in hospitals.
• Do not use the device on board aircraft.
• Operating of the device may interfere with medical devices

like hearing aids and pacemakers. Consult a physician or the

manufacturer of the medical device before using.

• Be aware of usage limitations when using the device at

places such as oil warehouses or chemical factories,

where there are explosive gases or explosive products

being processed. Even if your terminal is in idle state, it still

transmits radio frequency (RF) energy.

• Keep the antenna free from obstructions and position the

antenna straight up. This will ensure best call quality.

• Please put the device in a safe place. The device may cause

injury if used as a toy by children.

• Do not put other things on the terminal to avoid

overheating.

• Please use original accessories or accessories that are

approved by vendor. Using any unapproved accessories

may affect your device’s performance, damage your

terminal, or even cause danger to you and violate related

national regulations about telecom terminals.

• Because the device can produce an electromagnetic field,

do not place it near magnetic items such as computer disks.

• Do not expose the device to direct sunlight or store it in hot

areas. High temperatures can shorten the life of electronic

devices.

• Prevent liquids from leaking into the device.
• Do not attempt to disassemble the device by yourself. Non-

expert handling of the device may cause bodily injury or

device damage.

• Do not install or remove the SIM card when the power is on.