Galaxy Note 4 consuming lots of bandwidth?

Third and last problem: the phone seems to use almost all of the available bandwidth on my home ADSL connection.

As soon as the phone connects to my wifi, there seems to be almost no bandwidth available to my computer. The problem disappears when I switch off the phone's wifi.

Symptoms include the spinning pinwheel of doom on my Mac when my browser (Firefox) is loading ordinary web pages, interruption of audio streams, and extremely slow download speeds.

Normally, my download speeds over the ADSL connection are around 4 Mb/sec, sometimes as high as 5.6 Mb/sec.

Hardware & other details:

1. Galaxy Note 4 model SM-N910F
2. Android version 5.0.1.
3. Security software version MDF v1.1 Release 5; VPN v1.4 Release 4.
4. Running Freedome version (though problems seem to occur whether Freedome is on or off)
5. ADSL connection through Zen Internet
6. On Networks N300 router. I think this is similar to the Netgear router of the same model number.

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If I take any tablet and watch a video on DSL, it will soak the line. Not only that but if you used VPN that added even more overhead.

I see nothing wrong here.

I can't tell what's loaded beyond stock on the tablet. There's so much ADWARE on the apps that all you would have to do is install ONE BAD APP. Fix? Factory reset the tablet. Do not install apps.

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Diagnostic info about apps' wifi usage?

I'm not watching videos.

The problem occurs as soon as the phone connects to the wifi. Even if I'm doing nothing with the phone and have no apps running, it still happens.

You may be right that one app is causing the problem. I'm trying to figure out which app that might be. When I go to the Data Usage screen, though, none has consumed more than 1.5 MB in the past 30 days, except for Freedome (and it's stopped doing that since I changed its settings).

Data Usage just tells me about using data over the mobile network, though. Is there a way to get similar information about which apps are sending/receiving a lot of data over wifi connections?

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One more thing VoLTE
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Would VoLTE cause problems if I'm not on a phone call?

As mentioned above, the problem happens whenever the phone is connected to wifi on my home router.

Wouldn't VoLTE consume bandwidth only when I'm talking on the phone? Or is it a constant drain?

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But I've seen VoLTE or rather VoIP such as Republic run up a lot of data. As samsung and the carrier can modify the device/OS I can't be specific here. I'd factory reset it and re-test.

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