Help Samsung Galaxy S8 causing WiFi issues

[Jake Brown]

Hi everyone.

So my partner upgraded from her Samsung Galaxy S6 to her Samsung Galaxy S8 on Sunday. Everything about it is great so far, a fine upgrade. Apart from one thing. Whenever the S8 is using fairly bandwidth heavy apps, mainly Hearthstone. It loses internet, and not just for itself, all other devices suffer too, that's the PC, the TV, and my Galaxy S6 (the dreaded WiFi exclamation mark), meaning we either have to restart the router, or wait 10 minutes or so for it to recover. However when the S8 isn't connected to the internet or isn't doing anything substantial, all is well. We have a BT Smart Hub, contacted BT about this but they were stumped. Anyone else faced a similar issue, if so, did you find a solution?

It's worth noting that while no other devices cause this problem, the S8 causes no problems on the WiFi at her work, it seems to be the combination of Smart Hub and S8, the 2 just don't seem to get along.

PS: Unfortunately, factory resetting the S8 is not an option, also tried setting the S8 a Static IP address but that didn't do anything to resolve the issue

Thanks!

 

[svim]

I don't have one or even access to one but looking online for info on your BT Smart Hub it's apparently heavily focused on being one of those modem/router boxes that attempt to auto-configure itself with a minimum of user interaction to be involved. Those kinds of things are typically great when they work out, but there's always those isolated instances when they don't. Then it becomes a real project trying to diagnose the problem.
https://en.wikipedia.org/wiki/BT_Smart_Hub

You referred to setting that S8 up with an static IP address. If you did that through the phone's WiFi settings, don't do that. IP addresses need to be assigned by the router. By attempting to lock the IP address on her phone that's creating a situation where your home network could have address conflicts involving two different devices. You don't ever want that so reverse that step and either let her S8 receive whichever IP address gets assigned to it from your BT Smart Hub or give it a reserved IP through your Hub's interface. Which leads to the next step, if you go to
192.168.1.254
this should take you to your Hub's setup menu. In the 'Advanced' section you'll probably be able to re-configure things more easily.
http://setuprouter.com/router/bt/smart-hub/setup-79644-large.htm
-- Try removing your BT Smart Home WiFi entry in her S8, and any reference to it in your BT Smart Home, and then try to re-link the S8 again and pay special attention to whatever options might pop up in that 'Smart Setup' box. Or try just temporarily disabling 'Smart Setup' completely and see if that same problem happens with her S8.
https://bt.custhelp.com/app/answers...-on-the-bt-hub?-how-can-i-turn-it-on-and-off?
-- The fact that the problem is occurring when there's a heavy bandwidth service involved might point to a QoS issue. A lot of routers have a QoS option so that's another thing to look into.
https://en.wikipedia.org/wiki/Quality_of_service
-- Try temporarily disabling IPv6. Oddly even though that's becoming more or more common it still remains to be an occasional problem with Android WiFi connectivity.
-- Another thing you might try is if there's a 'guest network' option, set up a unique, separate guest WiFi network just for that S8. Then you can experiment with various options to see what works out and what doesn't to get that phone to connect properly, and then incorporate those options into your main WiFi network.