Mines does it at home and at work. Tried everything. Didn't fix it. Samsung needs to seriously fix this issue, Cause it's only the 12th and I'm already way past my data usage because it won't stay connected to the wifi. Not having this problem with any other devices.
I'm using same SSID for my home wifi. Every time I return to home my galaxy s8+ only connects to 2 4 ghz not 5 ghz. The 5 ghz is working because my TiVo is connected wirelessly with 5 ghz. Is there any fix for this? Also I did have separate SSID'S and the phone would give me the Exclamation point for not connected. Is this a problem with galaxy s8 phones?
Well I'm using the same SSID for both 2.4 & 5 so when I do "Forget" it wipes out for both I believe. So I only have 1 SSID Name set up for my router. When I did have separate SSID and only use 5 ghz I would sometimes get an Exclamation point saying my WIFI was not available.
@timstack Since you sometimes received that "Wi-Fi not available" message, it could be that your phone is just connecting to the 2ghz whenever the 5 drops or is out of range at all. You can switch it back to the 5ghz network from the Quick Settings menu at the top of the screen.
I hade the same issu. My solution was to enter the router loggin. (Tp link archer c9) hopfully it works on several routers.
Advace settings - network - Advace -
then klick use following dns adress and enter 126.96.36.199 in primery dns. Then save.
The explanation mark disapeard.
Same problem since second to last update.Wifi will only connect and stay connected when right beside the router.Connection shows full bars .2 s8's in the house both doing the same thing.