Are you encountering difficulties connecting your laptop to a WiFi network while your phone connects normally, or in various other challenging situations? We can share WiFi via Bluetooth using the following method:
Step 1: On your Android phone, go to Settings > Connections > More networks.
Step 2: Then select USB internet & WiFi hotspot or Bluetooth
Step 3: Click on Share internet connection via Bluetooth.
Step 4: The first item is your device name, check the box on the right to allow all other devices to find your device.
Step 5: On your laptop, click on the Bluetooth icon and turn on Bluetooth, then go to Add a Device on the top left to add a new device.
Step 6: Wait a moment for the laptop to find your phone, right-click on it and choose Connect Using > Access point.
Step 7: The laptop will send a connection request to the phone, and on the phone, click OK with the authentication code to connect the two devices via Bluetooth. You can now use the internet on your laptop via Bluetooth connection with the phone. Sharing Wi-Fi network via Bluetooth is successful up to this point.
https://Mytour.vn/chia-se-mang-wifi-qua-bluetooth-tren-android-979n.aspx
Thus, Taimienphi has guided you on how to share Wi-Fi network via Bluetooth to use the phone's Wi-Fi network and share internet connection with the laptop. I performed this on a Samsung Galaxy Trend Plus Android 4.2 device, and you can do the same on your device.