This tutorial assumes that you have already registered your device. If not, follow this <How to Register> 

🚗Power the Vehicle in ACC Mode

1. Turn the car to ACCESSORY mode (don’t start the engine).
2. Ensure the STATE LED on the NexCruise light bar is glowing.
   

🔌Check Device Connection

1. Ensure Bluetooth is turned on on your phone.
   
2. Open the Car.Os app → Home Screen.
   
3. The status should show: ✅ “Connected”.
   

1. Go to the “Configure” tab in the app.
   
2. Tap on “Software”.
   

⏳Start OTA Firmware Update

1. In the Car.Os app, tap “Update”.
   
2. The “Download Firmware” screen will appear.
   
3. Tap “Download Firmware” to begin.
   
    
   

   🌐Configuring the hotspot
   

   For Android:
   

   1. Go to Settings → Network & Internet → Hotspot & Tethering
      
   2. Turn on Mobile Hotspot
      
      
      
      
      
      Set Android Hotspot to 2.4 GHz Band.
      
      

   For iPhone:
   

   1. Go to Settings → Personal Hotspot
      
   2. Turn on Allow Others to Join
      
      

for iPhone version 12 or more, you may need to enable "Maximize compatibility" in hotspot settings.

🟢After Update

1. Check the current software version to ensure it is the latest. 
   
2. If you see:"Last Update Successful".