1. john12971a's Avatar
    I have a weird problem. NFC is killing my battery, but I can't turn it off. I'm using a Samsung Galaxy S5 running Android 5.0.2. It's a UK model on the EE network, SM-G901F.

    As the screenshots demonstrate, the NFC icon in quick settings is 'half green', and when I go to Settings -> NFC the toggle button is in the enable position, but is greyed out. There's seemingly an option to change the Main NFC technology from SIM card to Host-based card emulation, but selecting the latter option doesn't update the setting, as it reverts to Sim card.

    I don't know if my SIM card is NFC enabled or not. I've never used NFC before, and was trying to connect to a Sony NFC camera but it didn't work. I have since deleted the Sony apps. So basically my phone is stuck in limbo - I can't disable NFC, but it's chewing up my battery, quite noticeable shortening the phone's life. What can I do to fix this dreadful Android bug? Thanks

    Help - NFC is killing my battery and I can't disable it! Galaxy S5, 5.0.2-nfc-problem.jpg
    08-09-2016 06:01 PM
  2. john12971a's Avatar
    I believe I have found a solution. Anyone else who is unable to disable NFC on their Samsung Galaxy S5 might like to try the following steps (I'm not sure exactly which one worked):

    1. Turn off phone
    2. Remove SD card and SIM
    3. Power on phone. Enable Ultra power saving mode
    4. Disable Ultra power saving mode.
    5. Enable Flight Mode
    6. Check NFC status
    7. Disable Flight Mode
    8. Replace SIM and memory card

    This seems to work for me. Now the NFC icon is grey on the notification panel instead of 'half green' as it was before.

    Help - NFC is killing my battery and I can't disable it! Galaxy S5, 5.0.2-screenshot_2016-08-12-11-02-24.jpg
  3. B. Diddy's Avatar
    Moved to the S5 forum.
    08-09-2016 06:34 PM
  4. can3gxw's Avatar
    I would try installing the Sony app again - the one that turned it on - and then disable the NFC from within that app if that's what turned it on. Or, perhaps reinstalling the app may allow you to turn the NFC back off.

    Another option is wiping the device's cache partition. This should clear up any issues. It will NOT affect anything that's installed on your phone.

    https://support.t-mobile.com/docs/DOC-10683
    08-10-2016 09:24 AM
  5. john12971a's Avatar
    Thanks. I have already tried the partition trick.

    The Sony playmemories didn't turn NFC on - I did. Or at least I tried to. That's when it went from off to kind-of-on. Perhaps there's a bug where you try to enable NFC on a phone that doesn't have an NFC sim card?
    08-10-2016 09:36 AM
  6. john12971a's Avatar
    I've just done a full factory reset and the NFC icon is still half green and I can't disable it! Nightmare.
    08-11-2016 07:38 AM
  7. john12971a's Avatar
    I believe I have found a solution. Anyone else who is unable to disable NFC on their Samsung Galaxy S5 might like to try the following steps (I'm not sure exactly which one worked):

    1. Turn off phone
    2. Remove SD card and SIM
    3. Power on phone. Enable Ultra power saving mode
    4. Disable Ultra power saving mode.
    5. Enable Flight Mode
    6. Check NFC status
    7. Disable Flight Mode
    8. Replace SIM and memory card

    This seems to work for me. Now the NFC icon is grey on the notification panel instead of 'half green' as it was before.

    Click image for larger version. 

Name:	Screenshot_2016-08-12-11-02-24.jpg 
Views:	1 
Size:	145.9 KB 
ID:	234826
    B. Diddy and carolynopatrny like this.
    08-12-2016 05:04 AM
  8. B. Diddy's Avatar
    Nice work!
    08-14-2016 01:32 AM

Similar Threads

  1. I deleted android os and all roms!! PLEASE HELP!
    By AC Question in forum Ask a Question
    Replies: 1
    Last Post: 08-24-2016, 05:05 PM
  2. My call reject is full on my phone. How do I get more space
    By AC Question in forum Ask a Question
    Replies: 1
    Last Post: 08-09-2016, 06:16 PM
  3. Replies: 1
    Last Post: 08-09-2016, 06:07 PM
  4. I cannot sync my galaxy 6 edge + with my 2008 bmw.
    By AC Question in forum Ask a Question
    Replies: 0
    Last Post: 08-09-2016, 05:52 PM
  5. How do I disable direction lock on my Samsung S6.
    By AC Question in forum Ask a Question
    Replies: 0
    Last Post: 08-09-2016, 05:50 PM
LINK TO POST COPIED TO CLIPBOARD