Troubleshooting Common Network Configuration Issues for B211/B311/T110/T120

Issue 1: Repeated Connection Failures / No "Connecting to Network" Prompt on the Device

1. Press and hold the device’s SYNC button again, and wait until the LED indicator flashes blue. If the device does not emit a voice prompt, charge it for 10 minutes first before retrying.
2. Confirm that Bluetooth on your mobile phone is enabled (it must stay enabled throughout the setup process).
3. Restart your mobile phone and try adding the device again.

Issue 2: Persistent Connection Problems (Usually Caused by Abnormal Phone Settings; Network Settings Reset Required)

1. For iPhone Users

Go to Settings → General → Transfer or Reset iPhone → Reset → Reset Network Settings. Enter your lock screen password and confirm Reset Network Settings. After the phone restarts, mobile data and Wi-Fi settings will be reset, and you can then try adding the device again.

2. For Samsung and Other Android Users

Go to Settings → General Management → Reset → Reset Settings → Reset Network Settings. Enter your lock screen password and confirm Reset. Once the reset is complete, try adding the device again.

Issue 3: APP Prompts "Unable to Connect to Wi-Fi" / Fails to Detect the Corresponding Wi-Fi Signal

1. Confirm that both your mobile phone and the device are within the coverage of the corresponding Wi-Fi network: B211 and B311 only support 2.4GHz Wi-Fi, so you need to distinguish the names of 2.4GHz and 5GHz Wi-Fi networks in the router settings (avoid using the same name); T110 and T120 can connect to either frequency band.
2. Check that the Wi-Fi password is entered correctly, paying attention to uppercase and lowercase letters and special characters.
3. If the displayed Wi-Fi name is incorrect, tap "Switch Wi-Fi" at the corresponding step in the APP and select the correct Wi-Fi name. At the same time, check if the router has enabled MAC address filtering or blacklist function. If enabled, add the device’s MAC address (found on the back of the device or in the user manual) to the whitelist.
4. Confirm that the router’s AP Isolation function is disabled (this function blocks communication between devices, resulting in failure to detect the device hotspot).
5. Reduce the distance between the device and the router, avoid obstacles such as walls and metal objects, and minimize Wi-Fi signal interference.

Issue 4: No Voice Prompt or Indicator Light Change After Long-Pressing the SYNC Button

1. Charge the device with a DC5V2A adapter for 6–8 hours before attempting to add the device again.
2. If there is still no response, provide the device’s MAC address and record the following video for feedback: connect the device to a DC5V2A charger, press and hold the sync button for 2–5 seconds, record whether the device emits a voice prompt and whether the indicator light flashes; at the same time, open the Bluetooth list on your mobile phone and check if a Bluetooth device named after the device’s MAC address (located below the QR code on the back of the device) appears.

Issue 5: Other Special Cases

1. If none of the above troubleshooting steps work, restart the router and the device (press and hold the sync button on the back of the device for more than 10 seconds until you hear the prompt "device reset successfully"), then perform the network configuration again.
2. If the problem persists, record the status of the device indicator light and the specific error prompt from the APP, then contact the official customer service for further troubleshooting.

Updated on: 07/01/2026