Exclamation [Q] HTC One wifi issue - 5ghz vs 2.5ghz networks

Hi guys, my HTC just came back from the repair center (camera replacement because of low light issue) but now it seems it can't detect older 2.5 ghz wifi networks - so unable to connect to any network at home or work. It can only detect 5 ghz networks. Anyone faced similar issues? Any idea on how can I resolve it? The trip to the service center takes about a month. I have tried factory reset. Is there a way to just reinstall the radio?