Microsoft Lumia 640 XL LTE User Manual page 131

If you have any questions about using your wireless device with an implanted medical device, consult your health care
provider.
Accessibility solutions
Microsoft Mobile is committed to making mobile phones easy to use for all individuals, including those with disabilities.
For more information, visit aka.ms/phoneaccessibility.
Hearing
Warning: When you use the headset, your ability to hear outside sounds may be affected. Do not use the headset
where it can endanger your safety.
This device has been tested and rated for use with hearing aids for some of the wireless technologies used in this device.
However, there may be some newer wireless technologies used in this device that have not yet been tested for use with
hearing aids. It is important to try the different features of this device thoroughly and in different locations, using your
hearing aid or cochlear implant, to determine if you hear any interference. Consult your service provider about its return
and exchange policies and for information on hearing aid compatibility.
Some wireless devices may interfere with some hearing aids.
Your device complies with FCC rules on hearing aid compatibility. These rules require an M3 rating or higher. The M
value of your device is marked on the device sales package. To determine the M-rating of your hearing aid and
compatibility with this device, consult your hearing health professional. For more info about accessibility, go to aka.ms/
phoneaccessibility.
To use a telecoil-equipped hearing aid with this device, activate the hearing aid (T switch) and the device telecoil. The
sound quality depends on the type of your hearing aid.
Protect your device from harmful content
Your device may be exposed to viruses and other harmful content. Take the following precautions:
• Be cautious when opening messages. They may contain malicious software or otherwise be harmful to your device
or computer.
• Be cautious when accepting connectivity requests, browsing the internet, or downloading content.
• Only install and use services and software from sources that you trust and that offer adequate security and
protection.
• Install antivirus and other security software on your device and any connected computer. Only use one antivirus
app at a time. Using more may affect performance and operation of the device and/or computer.
• If you access preinstalled bookmarks and links to third party internet sites, take the appropriate precautions.
Microsoft Mobile does not endorse or assume liability for such sites.
Information on health
The U.S. Food and Drug Administration (FDA) and the U.S. Federal Communications Commission (FCC) published
statements and questions and answers concerning cellular telephones and health. Microsoft Mobile encourages you
to visit these websites for updated information. You can access the FDA website at www.fda.gov/Radiation-
EmittingProducts/RadiationEmittingProductsandProcedures/HomeBusinessandEntertainment/CellPhones/
default.htm and the FCC website at transition.fcc.gov/oet/rfsafety/rf-faqs.html. Additional health-related
information is available from the World Health Organization (WHO) at www.who.int/mediacentre/factsheets/fs193/
en/ and The National Cancer Institute ("NCI") www.cancer.gov/cancertopics/factsheet/Risk/cellphones. In the
event that you are concerned about possible health effects, the FDA suggests that you limit your own or your children's
radio frequency (RF) exposure by limiting the length of calls or by using handsfree devices.
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