Lenovo IdeaPad Y450 User Manual page 84

Chapter 6. Safety, use, and care information
The Mobile Broadband communication may affect the operation of
implanted cardiac pacemakers and other medically implanted
equipment. Patients with cardiac pacemakers should be well aware that
use of Mobile Broadband feature on this computer may cause the
implanted device to malfunction. If patients have any doubt that there is
interference taking place, immediately disable the wireless radio on the
computer and contact the doctor for more information.
The Mobile Broadband module embedded in your computer does not
support voice calls, hence their use for essential communications is not
possible. Therefore you should never rely upon the device for essential
communications.
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