Start with the phone and Wi-Fi network, not the robot hardware.
For the T20 OMNI, ECOVACS says the phone should be on the home Wi-Fi, the network should provide 2.4 GHz or mixed 2.4/5 GHz service, the SSID must be visible, and VPN, proxy or browser-authentication networks are not supported for pairing.
Find what is blocking Wi-Fi setup
Is your phone connected to the home Wi-Fi and able to access the internet?
ECOVACS lists this as a preparation step before adding the robot.
How to reconnect the T20 OMNI
Confirm the phone's home Wi-Fi works
Open a website over Wi-Fi before starting the robot setup so you know the local network itself is online.
Use 2.4 GHz or mixed 2.4/5 GHz
If your router has separate network names, connect the phone to 2.4 GHz and temporarily ignore the separate 5 GHz network.
Make the Wi-Fi name visible
Hidden SSIDs are not supported for T20 OMNI setup, so enable network-name broadcasting during and after pairing.
Turn off VPN and proxy features
Pair on a normal home network that does not require a browser page to sign in.
Add the robot again in ECOVACS HOME
Scan the QR code on the robot or select the model manually, enter the Wi-Fi password carefully and follow the in-app prompts.
Do not reset your router security at random
If the T20 OMNI still cannot connect on a normal visible home network, keep a note of the exact app error and contact ECOVACS support rather than disabling firewall or security features without a clear reason.
If Wi-Fi is not the real symptom
T20 OMNI Not Charging
Use this if the robot is offline because it is not receiving power at the station.
Cannot Return to Station
Use this if app control works but the robot has trouble finding or returning to the OMNI Station.