#1 Check the Wi-Fi signal

1. Check if the Wi-Fi signal or the mobile hotspot signal is too weak for the machine's connection.
   • If so, switch to a Wi-Fi network or mobile hotspot with a strong signal.

1. If this is not the case, proceed to the next step.

#2 Check Wi-Fi frequency

1. Follow the instructions below to check if the Wi-Fi network is 5GHz frequency.
   Note: The instructions provided below demonstrate the process on the Win11 system. For Windows systems versions prior to 11, the procedures are similar.
   1. Click the "Search" icon and enter "Settings"; then click "Open".
      
   2. On the left panel, select "Network & internet".
      
   3. Click “Wi-Fi”.
      
   4. Click "Hardware properties".
      
   5. Check the Wi-Fi network band to see if it's 5GHz.
      

1. If so, access the router's wireless settings to disable the 5GHz network.
   Note: As the Wi-Fi setup interfaces of different routers may vary, the image below is for reference purposes only.
   
2. Since the D series is not compatible with the 5GHz wireless network, it is advisable to connect the machine to a 2.4GHz Wi-Fi network only.
3. If this is not the case, move on to the next step.

#3 Check the mobile hotspot

1. For a mobile hotspot connection, follow the instructions below to troubleshoot the issue.
2. For Android users, tap "Mobile Hotspot" in settings to check if the hotspot operates on a 5GHz frequency band.
   • If so, select "2.4GHz preferred".

1. For iPhone users, tap to enable the "Maximize Compatibility" in the "Personal Hotspot" setting to ensure network frequency band compatibility.

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