I have noticed in the past 2 weeks that the WiFi is not working anymore on my phone Samsung Galaxy S6 or is unstable, but it's working fine with my laptop and the tablet.
My ex flatmate moved exactly 2 weeks ago and he had a booster. Before buying it I need to understand if it will fix the problem because the only device affected is my phone. I run a speed test with the laptop and it's fine, with the phone it shows "internet is slow".
After disconnecting from the WiFi the phone then shows "authentication error", that does not make any sense because it was connected before.
Any ideas how to fix this? Shall I buy a booster?
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