I bought my S22 direct from Samsung UK in April. It suddenly developed wifi issues recently. It struggles to find wifi access points, when it does it's incredibly slow 4-13Mbps typically and it disconnects frequently. I can't use wifi in coffee shops, at work, at friends houses etc so it's not just an issue with my home router setup (which I have also reset anyway). I tried a network settings reset on the phone, then a factory reset without joy. After much experimenting I discovered the only wifi it can connect to reliably is a wifi6 connection but even then only if it is set to 2.4Ghz alone.
Samsung have had a look at and I've received it back in exactly the same state, they said all they found were Android issues no hardware fault, so all they did is factory reset it, it's still in it's factory reset state. I contacted Samsung and they say their technicians (Wefix) are telling them there is nothing wrong with it and so they won't do anything about it! I did ask if there's nothing wrong with it then what's the issue with swapping it for another then? No dice.
What do I do? Who do I complain to? There are no Samsung stores near me. Why the hell am I jumping through hoops for what is a simple issue?
