Chromecast is optimized to work best with specific Wi-Fi standards depending on where they are sold. This likely means you bought a Chromecast model that is not intended for use in your country. That either means Chromecast is not officially sold/supported in your country, or the seller you bought from sent you the wrong model for your country. In either case, the first thing to try is to factory reset your Chromecast and retry setup. If that doesn’t resolve the issue, there are some workarounds you can try:
- If your router is a dual band router and has different network names for the two Wifi bands, make sure you are connecting to the 2.4GHz band and not 5GHz.
- Login to the admin page of your router (refer to the manual or the back of the device).
- Navigate to Wifi or Wireless settings (the naming of the menu options you see will differ by router manufacturer and you may need to click to go into "advanced" settings to see some options).
- If your router is a dual band router and doesn't currently have different names for the two bands, look for an option to turn on different network names for the two bands.
- If "Wifi Protected Setup" or "WPS" is enabled, disable it.
- Set your Wifi channel/band (channel selection) to a value between 1 and 10.
Chromecast manufactured for certain countries cannot connect to Wifi channels above certain frequencies which is why I suggest changing your Wifi channel to between 1 and 10. Checking you are using the 2.4GHz band and not the 5GHz band is for dual band routers and is for the same reason. The two steps are interchangeable for some routers but not for others.
If you'd rather not troubleshoot, you also have the option to return it to the place you purchased it from if you kept the receipt/proof of purchase.
