1. Windows Central Question's Avatar
    I have two Lumia's: 925 and 625.

    Since we try to have as less radiation as possible (if possible at all, but I don't want to go into that discussion) around the house we switch our phones to airplane mode as much as possible. Off course also at nights.

    Now, I discovered with a special measuring device, which is able to measure all kinds off radiation) that these lumia's frequently send a signal even when it is on airplane mode (with Wifi, NFC, BT off). The strangest thing is even that this is NOT occurring when the phone is normally on, but only when the lock-screen is active. (with or without Glance where applicable)

    I notice a peek in send-signal every 5 seconds. I tried playing around with several settings but the devices keep doing this..

    Is anybody familiar with this?
    10-19-2016 02:53 AM
  2. abhishek singh21's Avatar
    welcome to windows central.

    that could be gps signal , trying to locate your device as windows phone constantly monitors your location. Location is still turned on even on airplane mode so thats that.

    If you need additional help or want to reply to this thread , learn how to join windows central.
    10-19-2016 06:12 AM
  3. rjoosen's Avatar
    Thanks for your answer. I tried that, manually switched off Location when in Airplane Mode and have the same problem.
    10-19-2016 07:04 AM
  4. rjoosen's Avatar
    Oh, I noticed that this problem only occurs with Windows 10... with 8.1 there's no problem like this
    10-19-2016 08:31 AM
  5. xandros9's Avatar
    It could be the proximity sensor.
    siminik likes this.
    10-19-2016 06:35 PM
  6. rjoosen's Avatar
    Ok, can this be switched off?
    10-20-2016 04:10 AM
  7. xandros9's Avatar
    Tape over the top of the display? There's a small window that lets the sensor "peek" through, which functions not unlike a radar speed gun used by Police.

    Of course, it can also be something else.
    10-20-2016 10:43 PM
  8. abhishek singh21's Avatar
    if you have double tap to wake up enabled, disable that. That should not trigger the proximity sensor when the device is sleeping.
    xandros9 likes this.
    10-21-2016 01:38 AM
  9. rjoosen's Avatar
    To bad that does not fix the problem.
    10-22-2016 08:09 AM

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