@TKG-12_3 The matter has been resolved. Just refunded my phone and got the money back. Forgot to put an update on it here. Also how does one close a thread?

I have done, so and also tried connecting the WiFi only via 4g and 5g seperatly. It did not work however, so i am thinking on contacting tp-link themself, too see if i can get any clarity about this...

Ever since i bought my new Samsung Galaxy a34 5g, it has had problem with the WiFi. Sometimes it works completely fine, but other times it has huge quality and speed dips, like when I am surfing...