Sonoff light bulb pairing

If you have problems pairing the Sonoff light bulb, follow these steps. Maybe it will help you.

1. Turn off the router
2. Make hotspot from another phone with the same SSID and password as your router's Wi-Fi
3. Try the pairing process again
4. Voilà!

To put it into pairing mode, switch the bulb ON-OFF 3 times, and it will start blinking.

I think that 5GHz bandwidth is interfering with 2.4GHz. Because of that, the light bulb isn't discovered by the app.