Wifi turning off by itself

[cinnamon009]

Hi, I have an issue with my S9+ where the wifi keeps turning itself off. If I don't notice then I don't remember to turn it back on and I have used all my data this month now due to this problem. I have checked all my settings and nothing jumps out as being incorrect. The setting which turned it off whilst asleep is no longer there. I have it set to turn on automatically for frequently used wifi so it should connect anyway but it isn't. Any clues? 

[SaudA]

Hi @cinnamon009

Do you have Battery saver turned on? It might be disconnecting to conserve battery. Check this in Settings > Device maintenance > Battery.

Also, is this happening with your home Wi-Fi or somewhere else?

[cinnamon009]

No I don't have battery saver turned on. It happens at home and at work that I have noticed so far.  They are the main two wifi networks I use  

[SaudA]

Cheers for confirming. Can you check if the phone's Software is up to date?

Then, go in to Settings > Connections > Wi-Fi > Select the network > Forget.

Connect to it again after 5-10 mins and monitor the phone for the same issue.

Edit: Forgot to mention, if you've already tried these steps, let me know and we can jump over to the next steps.

[cwatson390]

Im having the same issue since the newest update. But it also seems to be affecting my printing capabilities. 

[Jimbacca]

You are correct. It started turning itself off after the last security update about a couple weeks ago. It is also happening our other S9.

[S9User2]

I'm having the same issue with my S9 since the update as well. Used a significant amount of data before I realized this was happening. How do I stop the WiFi from turning on and off?

[SteveOx]

I am having the same issue with my 3 Samsung Galaxy S9+ phones. I am an IT professional and I tried everything without any luck. Seems to turn of the WiFi by itself only when I am using an app that needs a fair amount of data! Sometimes I get a pop-up to allow others apps to turn it back on!!! Since I can't rollback the update, I told everyone on my plan to turn OFF mobile data. YOU NEED TO FIX THIS ASAP.

[Mrlaugh]

I'm having the same issue. Spent an entire weekend on mobile data while at home burning through 65% of my mobile data in the first five days of the billing cycle. I don't always notice the notification at the bottom of the screen that says WiFi disconnected.

The only solution I have so far is to turn mobile data off, which is very annoying.

[SteveOx]

I am having the same issue with my 3 Samsung Galaxy S9+ phones. I am an IT professional and I tried everything without any luck. Seems to turn of the WiFi by itself only when I am using an app that needs a fair amount of data! Sometimes I get a pop-up to allow others apps to turn it back on!!!  (see attached screenprint, I have an Xfinity mobile plan).

Since I can't rollback the Samsung phone update, I told everyone on my phone plan to turn OFF mobile data. YOU NEED TO FIX THIS ASAP.